2026-10-11T01:39:04Z https://www.scidb.cn/oai

10.57760/sciencedb.011ua 2026-09-08T14:34:00Z

2026-09-08 Influence of Contact Angle on the Friction and Wear Behavior of the Carbon Strip in Pantograph–Catenary Systems doi:10.57760/sciencedb.011ua en Non-uniform wear of the carbon strip in the high-speed railway pantograph–catenary system leads to the formation of a contact angle between the carbon strip and the contact wire, thereby affecting both the current collection efficiency of the pantograph–catenary system and the wear mechanism of the friction pair. To further investigate the influence of the contact angle on the current-carrying friction and wear performance of the friction pair in the pantograph–catenary system, this study utilized a high-speed current-carrying friction and wear tester to simulate the actual operating conditions of the high-speed railway pantograph–catenary system. The friction and wear behavior between the contact wire and the carbon strip under different contact angles was explored, with particular attention paid to the arc discharge phenomena and temperature variations between the friction pair. Experimental results indicate that, under constant normal load and sliding speed, the contact angle has a significant influence on the arc discharge energy, temperature, coefficient of friction, and wear mass of the carbon strip within the friction pair. This influence becomes particularly pronounced when the contact angle exceeds 4°. Under identical contact angles, the arc discharge energy, temperature, coefficient of friction, and wear mass of the carbon strip are directly proportional to the sliding speed and inversely proportional to the normal load. Furthermore, scanning electron microscopy (SEM) was employed to observe the worn surface morphologies of the carbon strip and contact wire under different contact angles, and the influence of contact angle on the wear mechanisms of both the carbon strip and contact wire was discussed. The results show that, under constant normal load and sliding speed, increasing the contact angle intensifies arc erosion on both the carbon strip and the contact wire, enlarges the arc-ablation area, and increases the proportion of electrical wear. When the contact angle exceeds 4°, the surface wear condition of the carbon strip deteriorates significantly. Under a constant contact angle, increasing the sliding speed progressively worsens the surface wear condition of the carbon strip. In actual operation and maintenance, by implementing regular inspection and grinding to control the contact angle between the carbon strip and the contact wire within 4°, arc erosion can be significantly suppressed, material wear can be delayed, and thus the operational safety, stability, and cost-effectiveness of the pantograph–catenary system can be enhanced. contact angle; arc erosion; temperature; friction coefficient; wear mass; wear mechanism Yang Hongjuan Xu Hongfei Chen Longting Liu Changjiang Jiang Li Dengxing Bridge Kou Qining Wang Peishen PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset http://www.doi.org/10.16078/j.tribology.2025231 Science Data Bank