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Keywords = Top-of-Rail (TOR) products

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18 pages, 4098 KiB  
Article
The Effect of Top-of-Rail Products Incorporating Environmentally Acceptable Solid Particles on Friction, Retentivity, Wear and Airborne Particle Emissions of Wheel–Rail Contact
by Rahma Boukhris, Ellen Bergseth, Ulf Olofsson, Johan Leckner and Roland Ardai
Machines 2025, 13(3), 200; https://doi.org/10.3390/machines13030200 - 28 Feb 2025
Viewed by 752
Abstract
Excessive friction at the wheel–rail contact can limit the lifespan of the wheels and rails. Meanwhile, insufficient friction can lead to increased braking distance, risking safety. Top-of-Rail (TOR) products are recognised for their potential to achieve intermediate friction levels at the wheel–rail contact [...] Read more.
Excessive friction at the wheel–rail contact can limit the lifespan of the wheels and rails. Meanwhile, insufficient friction can lead to increased braking distance, risking safety. Top-of-Rail (TOR) products are recognised for their potential to achieve intermediate friction levels at the wheel–rail contact and mitigate wear damages. However, the impact of these products on the airborne wear particles emitted from wheel–rail contact is not thoroughly evaluated. High particle concentration levels, particularly on underground train platforms, raise respiratory and cardiovascular health concerns. This research employs a pin-on-disc to study the effect of laboratory (environmentally acceptable) and commercial TOR products on friction, retentivity, wear, and airborne particle emissions at the wheel–rail interface. The results indicated that TOR products with higher retentivity offered a wider interval of desired intermediate friction levels. The TOR products significantly reduced particle emissions compared to the dry condition. TOR products can, therefore, be promising in controlling friction and mitigating wear and particle emissions at the wheel–rail interface. However, to achieve the benefits of these products, it is essential to tailor their chemical composition carefully. Full article
(This article belongs to the Special Issue Wheel–Rail Contact: Mechanics, Wear and Analysis)
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2 pages, 309 KiB  
Extended Abstract
Top-of-Rail Lubricants: Potential Risks and Benefits
by Radovan Galas, Milan Omasta and Martin Hartl
Proceedings 2018, 2(16), 1140; https://doi.org/10.3390/proceedings2161140 - 17 Sep 2018
Viewed by 2066
Abstract
Top-of-rail (TOR) lubricants represent modern approach for friction modification between wheel and rail. The main goal of this study was to investigate potential risks and benefits associated with the application of these products, especially in terms of adhesion, wear, and noise. For this [...] Read more.
Top-of-rail (TOR) lubricants represent modern approach for friction modification between wheel and rail. The main goal of this study was to investigate potential risks and benefits associated with the application of these products, especially in terms of adhesion, wear, and noise. For this purpose, both laboratory and field experiments were carried out. Full article
(This article belongs to the Proceedings of i-RISE 2018)
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