Simulation Analysis Of Double Row Tapered Roller Bearing Faults

Double row tapered roller bearing is a key component of the high-speed train travel,and is also very important in the safe operation of high-speed trains.Because it is often operated at higher speeds and higher pressures,the bearing is the fault component with the highest probability of occurrence.It is necessary to increase the research on double-row tapered roller bearings,improve the maintenance technology,and predict the high-speed train.Whether a fault has occurred in the operation to quickly complete the repair of the axle box bearing.In this paper,based on fault simulation analysis,based on the actual measured data,according to the bearing condition and working characteristics of the axle box bearing,the double-row tapered roller bearing model is established,and according to the pitting corrosion and spalling faults in common faults Seven fault models of inner ring single point fault,inner ring two point fault,outer ring single point fault,outer ring two point fault,inner and outer ring faults,inner ring spalling fault and outer ring spalling fault were respectively created.Using the fault characteristic frequency formula,the frequency of the inner and outer rings,the rolling elements and the cage are calculated separately.The modal analysis of each fault model is carried out by finite element software,and the characteristic frequencies and vibration modes of each order are obtained,and the theoretical calculation values and modal analysis results of the bearing fault characteristic frequency are compared.Under the same axial force,radial force,250km/h working condition and 200km/h working condition,the bearing models are simulated and analyzed,and the equivalent stress distribution and displacement of each fault bearing are compared.According to the working state of axle box bearing of high-speed train,the results of modal analysis are verified by the theoretical fault characteristic frequency value,and the feasibility of the fault model is proved.The pitting corrosion and spalling of inner and outer rings of double-row conical roller bearings at 250km/h and 200km/h working conditions were studied.By comparing the simulation data,it was found that the failure would aggravate the vibration of the bearing and accelerate the damage speed of the axle box bearing.