THE ROLLING OF A DRIVING WHEEL ON THE RAIL
IN LOW ADHERENCE CONDITIONS CAUSED
BY PRESENCE OF A CONTAMINANT
One of the most important factors for providing the rolling safety
conditions of the rolling stock is adherence. A certain level of adherence is
imperative in traction and breaking processes. When low adherence between
wheel and rail occurs, many negative factors can arise, such as: defects on
wheels and rails, station platform overruns, signals passed at danger and even
collisions. Among the causes that get to decrease wheel-rail adhesion is natural
contamination. The major adherence reducers are: water, rust, oil and leaves.
Cuvinte cheie: aderenţă, coeficient de aderenţă, contact de rulare
roată-şină, viteză de alunecare, contaminant
Keywords: adhesion, adhesion, coefficient of rolling contact wheel-rail,
sliding speed, that contaminates
