The method and its result of adding the retaining ring on wheel with the wheel hub not removed;

The feasibility and the technic procedure of adding retaining ring on the Namibiya locomotive wheel are described.

Because the assembly locomotive wheel which is widely used in our country may cause the digression and subversion accident because of the rim relaxation, which badly affects the safety of the railage, this article brings forward the method that adds a safety retaining ring to the rim of the assembly locomotive wheel, which can effectively prevent the serious accident such as locomotive.

Modal analysis of locomotive wheelset equipped with coupling collar;

For the purpose of preventing against relaxation of train wheels, Zhengzhou railway station brought forward the project of equipping coupling collar on train wheels, which could prevent against the serious accident after putting on practice.