Communications - Scientific Letters of the University of Zilina 2025, 27(3):B138-B146 | DOI: 10.26552/com.C.2025.032
The Operating Procedure of the Device Enhancing the Wheel-Rail Adhesion
- 1 Private Company Scientific Production Company "Poisk", Kyiv, Ukraine
- 2 Department of Logistics and Transport Safety, Volodymyr Dahl East Ukrainian National University, Kyiv, Ukraine
The results of the analysis of sand application efficiency for improving wheel-rail adhesion are presented. An algorithm for the sandbox operation is substantiated, based on supplying sand under the wheels when their slip reaches a critical level, delivering sand in proportion to the vehicle speed, and automatically purging the sand supply pipes. The principle of sandbox operation is based on the mechanical interaction between the moving elements and sand. It has been established that the maximum adhesion coefficient is achieved when the sand is evenly distributed in a single layer within the wheel-rail contact area. The important role of the contact area in the wheel-rail adhesion is emphasized. A sandbox implementing the developed sand supply algorithm is proposed. The introduction of this sandbox on Ukrainian-manufactured trams is described.
Keywords: sand supply, adhesion coefficient, sand saving, wheel-rail contact area
Grants and funding:
The authors received no financial support for the research, authorship and/or publication of this article.
Conflicts of interest:
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Received: December 11, 2024; Accepted: March 10, 2025; Prepublished online: April 8, 2025; Published: July 1, 2025 Show citation
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