Load Characteristics of Axle Box Bearing Raceway of High-speed EMU

doi:10.3901/JME.2020.04.135

Abstract

Abstract: Axle box bearing is an important core department of the train running parts, but it becomes one of the vulnerable parts, because of its bad load condition. It is of great significance for bearing life prediction based on load distribution and ensuring its safety and reliability by studying the load characteristics between roller raceways in operation. Based on the dynamic model of vehicle-track dynamic model with bearings, the contact load characteristics of roller raceway under track excitation and train running speed are studied. The results show that under the condition of no excitation, the speed has little effect on the contact load of the roller raceway, but in the non-bearing area, the roller will contact with the outer raceway, and the contact load is square with the speed. The track excitation condition will affect the instantaneous value of contact load of roller raceway. The standard deviation of the contact load on the outer ring increases with the speed of the vehicle. By studying the maximum contact load on the outer ring, it is found that with the increase of speed, the greater the vibration caused by track excitation, the greater the fluctuation of contact load data of roller raceway.

Key words: high speed vehicle, axle box bearing, vibration acceleration, contact load

CLC Number:

U271

ZHA Hao, REN Zunsong, XU Ning. Load Characteristics of Axle Box Bearing Raceway of High-speed EMU[J]. Journal of Mechanical Engineering, 2020, 56(4): 135-142.

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