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Influence of Correctness of Running Gear Assembly on Freight Wagon Wheels’ Wear

Konowrocki R., Zbieć A.

Machine Dynamics Research

2018

Vol. 42, No. 1

139--151

The paper presents an analysis of a newly diagnosed cause of wheel thread wear in a freight wagon and also possible other causes of abnormal wear of wheels in freight wagon wheelsets are mentioned. Newly diagnosed cause for excessive wear of the railway wheel thread is an incorrect position of wheelsets in relation to the bogie frame. The paper presents results of measurements carried out on a real freight wagon to get identification of wheels’ wear and geometry of vehicle components. In order to analyze the influence of incorrectly positioned wheelset axles on the degree of wheel wear a numerical model of a freight wagon was developed. Numerical calculations at various speeds of wagon and several versions of wheelsets skew position were carried out. The results obtained from numerical tests i.e. a significant influence of non-parallel axles of wheelsets on abnormal wear of wheel threads are shown. Conclusions drawn from the computation results can be very useful at a running gear repairs as well as helpful in a regular maintenance process. It will also reduce the costs of repairs of wheelsets and extend their service life.