PT Journal
AU Osenin, Y
   Chernetska-Biletska, N
   Kliuiev, S
TI The Operating Procedure of the Device Enhancing the Wheel-Rail Adhesion
SO Communications - Scientific Letters of the University of Zilina
PY 2025
BP B138
EP B146
VL 27
IS 3
DI 10.26552/com.C.2025.032
WP https://komunikacie.uniza.sk/artkey/csl-202503-0002.php
DE sand supply; adhesion coefficient; sand saving; wheel-rail contact area
SN 13354205
AB 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.
ER