A novel test method has been used to study how applied and natural lubrication (leaf and humidity) influences the coefficient of friction in the wheel-rail contact. A pin-on-disc tribometer placed in a climate chamber was used as the test equipment. The pin-on-disc contact simulates the wheel-rail contact caused by commuter train traffic on straight track. The results show that the coefficient of friction decreases when the relative humidity increases and decreases even more when a leaf is used as a lubricant. By using an elm leaf as the lubricant, the coefficient of friction is reduced by a factor of four compared with the unlubricated case. However, the coefficient of friction decreases even more when a rail lubricant is used.
Influence of leaf, humidity and applied lubrication on friction in the wheel-rail contact: Pin-on-disc experiments
Auswirkung von Blättern, Feuchtigkeit und Schmiermitteln auf die Reibung bei Rad-Schiene-Kontakt: Stift-auf-Scheibe-Versuche
2004
8 Seiten, 18 Quellen
Aufsatz (Zeitschrift)
Englisch
Fahrzeugrad , Eisenbahn , Luftfeuchte , Reibung , Adhäsion , Gleis , Blatt (Pflanze) , Reibungskoeffizient , Reibung (Metall-an-Metall) , Reibungsverhalten , Eisenbahnradreifen , Eisenbahnschiene , Schienenverkehr , experimentelle Untersuchung , Schmiereigenschaft , relative Luftfeuchte , Schmiermittel
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