Publication detail

The effect of top of rail lubricant composition on adhesion and rheological behaviour

KVARDA, D. SKURKA, Š. GALAS, R. OMASTA, M. SHI, L. DING, H. WANG, W. KŘUPKA, I. HARTL, M.

Czech title

Vliv složení maziva pro temeno kolejnice na adhezi a reologické vlastnosti

English title

The effect of top of rail lubricant composition on adhesion and rheological behaviour

Type

journal article in Web of Science

Language

en

Original abstract

The effect of top of rail lubricant composition on adhesion has been investigated using a laboratory ball-on-disc tribometer. Rheological properties were analysed using viscosimeter and high pressure torsion device. As a base medium, a biodegradable ester oil with bentonite thickener was selected. Added particles for friction modification were aluminium oxide, zinc oxide, copper sulfide and solid lubricants molybdenum disulfide and graphite. The effect of these components in the base medium on adhesion was evaluated. It was found that the most dominant component was the solid particles for friction modification. Based on the results, top of rail lubricant substances were prepared and tested. The best performing substances provided the optimal level of adhesion. These substances also showed resilience to overdosing, which caused commercial products to provide very low adhesion conditions. The rheological investigation confirmed the very low adhesion is controlled by elastohydrodynamic regime while the stable values are a result of transition to boundary lubrication.

Czech abstract

Vliv složení maziva pro temeno kolejnice na adhezi byl zkoumán pomocí laboratorního tribometru typu ball-on-disc. Reologické vlastnosti byly analyzovány pomocí viskozimetru a vysokotlakého torzního zařízení. Jako základní médium byl zvolen biologicky odbouratelný esterový olej s bentonitovým zahušťovadlem. Přidané částice pro modifikaci tření byly oxid hlinitý, oxid zinečnatý, sulfid mědi a pevná maziva sulfid molybdeničný a grafit. Byl hodnocen vliv těchto složek v základním médiu na adhezi. Bylo zjištěno, že nejdominantnější složkou byly pevné částice pro modifikaci tření. Na základě výsledků byly připraveny a otestovány maziva pro temeno kolejnice. Nejvýkonnější látky poskytovaly optimální úroveň adheze. Tyto látky také vykazovaly odolnost vůči předávkování, zatímco komerční produkty poskytovaly velmi nízkou adhezi. Reologický průzkum potvrdil, že velmi nízká adheze je řízena elastohydrodynamickým režimem, zatímco stabilní hodnoty jsou výsledkem přechodu na mezní mazání.

English abstract

The effect of top of rail lubricant composition on adhesion has been investigated using a laboratory ball-on-disc tribometer. Rheological properties were analysed using viscosimeter and high pressure torsion device. As a base medium, a biodegradable ester oil with bentonite thickener was selected. Added particles for friction modification were aluminium oxide, zinc oxide, copper sulfide and solid lubricants molybdenum disulfide and graphite. The effect of these components in the base medium on adhesion was evaluated. It was found that the most dominant component was the solid particles for friction modification. Based on the results, top of rail lubricant substances were prepared and tested. The best performing substances provided the optimal level of adhesion. These substances also showed resilience to overdosing, which caused commercial products to provide very low adhesion conditions. The rheological investigation confirmed the very low adhesion is controlled by elastohydrodynamic regime while the stable values are a result of transition to boundary lubrication.

Keywords in Czech

Součinitel adheze; Mazání temena kolejnice; Tribologie kontaktu kola a kolejnice; Reologie; Numeircký model

Keywords in English

Coefficient of adhesion; Top of rail lubrication; Wheel-rail tribology; Rheology; Numerical model

Released

23.01.2022

Publisher

Elsevier

Location

Nizozemsko

ISSN

2215-0986

Volume

35

Number

1

Pages from–to

101100–101108

Pages count

9

BIBTEX


@article{BUT176840,
  author="Daniel {Kvarda} and Šimon {Skurka} and Radovan {Galas} and Milan {Omasta} and Lu-bing {Shi} and Haohao {Ding} and Wenjian {Wang} and Ivan {Křupka} and Martin {Hartl},
  title="The effect of top of rail lubricant composition on adhesion and rheological behaviour",
  year="2022",
  volume="35",
  number="1",
  month="January",
  pages="101100--101108",
  publisher="Elsevier",
  address="Nizozemsko",
  issn="2215-0986"
}