https://doi.org/10.3103/S106836662201010X
DOI:
https://doi.org/10.31891/2079-1372-2025-118-4-42-49Keywords:
hot scuffing, tribological pair, fuel pump, microhardness, secondary structures, surface damageAbstract
The article investigates the causes of surface degradation in the “stationary shaft–bushing” tribological pair of the roller assembly of a diesel engine fuel pump plunger in a heavy-duty truck, operating under increased loads and boundary lubrication conditions. A surface damage passporting methodology was applied, including analysis of microhardness, surface roughness, geometrical accuracy, and structural transformations within surface layers of the components, supplemented by elements of X-ray diffraction analysis.
It was established that the dominant wear mechanism is hot scuffing (adhesive wear of the second kind), driven by irregular lubricant supply, chemical affinity of the materials of both components (bearing steel 100Cr6/ШХ15), localized load concentration, and the stationary configuration of the shaft. The formation of secondary hardened “white layers” was observed, indicating thermal overloading and a reduced load-bearing capacity of the surface layers after prolonged service.
A set of design, technological, and operational measures is proposed to improve the reliability and durability of this friction pair.
References
Lindholm P. Characterisation of wear on a cam follower system in a diesel engine. Wear. 2003. https://doi.org/10.1016/S0043-1648(03)00335-1
Alakhramsing S. S., de Rooij M. B., Schipper D. J., van Drogen M. Lubrication and frictional analysis of cam–roller follower mechanisms. Proc. IMechE Part J: J. Engineering Tribology. 2018. https://doi.org/10.1177/1350650117718083
Spikes H. Mechanisms of ZDDP—An update. Tribology Letters. 2025. https://doi.org/10.1007/s11249-025-01968-3
Tsai A. E. et al. Dynamics of tribofilm formation in boundary lubrication. Tribology International / Materials. 2024. https://doi.org/10.3390/ma17061335
Dawczyk J. Film thickness and friction of ZDDP tribofilms. Tribology Letters. 2019. https://doi.org/10.1007/s11249-019-1148-9
Bai, L., Meng, Y., Zhang, V. et al. Effect of Surface Topography on ZDDP Tribofilm Formation During Running-in Stage Subject to Boundary Lubrication. Tribol Lett 70, 10 (2022). https://doi.org/10.1007/s11249-021-01552-5
Akchurin A. A mixed-TEHL analysis of cam–roller contacts considering thermal and roughness effects. Journal of Tribology. 2018. https://doi.org/10.1115/1.4040979
Aulin, V., Gypka, A., Liashuk, O., Stukhlyak, P., & Hrynkiv, A. (2024). A comprehensive method of researching the tribological efficiency of couplings of parts of nodes, systems and aggregates of cars. Problems of Tribology, 29(1/111), 75-83. https://tribology.khmnu.edu.ua/index.php/ProbTrib/article/view/943
Aulin, V., Lyashuk, O., Gupka, A., Tson, O., Dmitro, M., Sokol, M., ... & Yarema, I. (2024). Tribodiagnosis of the surface damage of tribo-coupling parts materials during machine operation. Procedia Structural Integrity, 59, 428-435. https://doi.org/10.1016/j.prostr.2024.04.061
Gypka, A., Aulin, V., Lyashuk, O., Hrynkiv, A., & Hud, V. (2024). The patterns of changes in the degree of lubrication of the crankshaft bearings of car engines depending on the parameters of the load-speed modes of operation. Problems of Tribology, 29(3/113), 72-78. https://tribology.khmnu.edu.ua/index.php/ProbTrib/article/view/965
Pashechko, M., Dziedzic, K., Stukhliak, P., Barszcz, M., Borc, J., & Jozwik, J. (2022). Wear Resistance of Eutectic Welding Coatings of Iron-Based Fe–Mn–C–B–Si–Ni–Cr at Increased Temperature. Journal of Friction and Wear, 43(1), 90–94. https://doi.org/10.3103/S106836662201010X
Stukhlyak, P. D., & Bliznets, M. M. (1987). Wear resistance of epoxyfuran composites modified with polyvinyl alcohol. Soviet Journal of Friction and Wear (English translation of Trenie i Iznos), 8(3), 122–124. Scopus.
Stukhlyak, P. D. (1986b). Antifriction and adhesive properties of coatings of thermosetting plastics modified with thermoplastic polymers. Soviet Journal of Friction and Wear (English translation of Trenie i Iznos), 7(1), 138–141. Scopus.
Stukhlyak, P. D. (1986a). Antifriction and adhesion performances of thermosetting coatings modified by thermoplastics. TRENIE & IZNOS, 7(1, 1986), 173–177.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2025 Problems of Tribology
This work is licensed under a Creative Commons Attribution 4.0 International License.
