Title :
Dynamic and thermophysical processes in low-current sliding contacts
Author :
Kharin, S.N. ; Mikhailov, V.V. ; Batalin, A.S.
Author_Institution :
Inst. of Math & Mech., Acad. of Sci., Alma-Ata, Kazakh SSR, USSR
Abstract :
The dynamic and thermophysical processes of local and overall interactions between a brush and a ring in low-current contacts are investigated, taking into account friction, microarcing, and Joule heating. Using systems of partial different equations describing nonstationary heat and mass transfer and ordinary differential equations for contact element oscillations in tangential and perpendicular directions, a mathematical model is derived. Criteria ensuring minimum wear are determined based on selection of the contact materials, microrelief of friction surface, sliding speed, static load, and other characteristics set by the operating regime and electrical circuit parameters. The results of experimental and practical evaluations of low-current sliding contact elements with improved wear characteristics are given
Keywords :
arcs (electric); electrical contacts; friction; wear; Joule heating; brushes; contact element oscillations; friction; friction surface; low-current sliding contacts; mass transfer; mathematical model; microarcing; minimum wear; ordinary differential equations; overall interactions; partial different equations; perpendicular directions; sliding speed; static load; tangential directions; thermophysical processes; Brushes; Damping; Equations; Friction; Lubricants; Pressing; Rough surfaces; Rubber; Surface resistance; Surface roughness;
Conference_Titel :
Electrical Contacts, 1990. Proceedings of the Thirty-Sixth IEEE Holm Conference on ... and the Fifteenth International Conference on Electrical Contacts
Conference_Location :
Montreal, Que.
DOI :
10.1109/HOLM.1990.113026
