Mitjan Kalin (Avtor), Dejan Poljanec (Avtor)

Povzetek

This paper reports on the performance and tribological mechanisms in a newly developed design for an electrical sliding contact in terms of sliding velocity, normal force and electrical current during 24-h experiments. Copper discs were run against hard-carbon graphite, electrographite and polymer-bonded graphite. The average wear rates of the copper discs against the three graphite materials were reduced to 10[-8] and 10[-7] mm3/Nm, and the graphite discs to 10[-6] mm3/Nm, which is for 1 and 1-2 orders of magnitude less, than copper slip-rings and carbon brushes in conventional systems, respectively. The coefficient of friction was 0.2-0.4, depending on the conditions, which is comparable to the values of conventional electrical sliding contact. Tribofilms are generated in almost all contacts, and crucially determine the contact performance. The polymer-bonded-graphite/Cu formed the most compliant tribofilms that unify and decrease the local contact pressures and temperatures, and have the largest surface coverage that reduces the wear and contact resistance, which in turn reduces the contact instabilities and so the friction.

Ključne besede

electrical contacts;copper;graphite;friction;wear;electrical current;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 539.92:621.8(045)
COBISS: 16085531 Povezava se bo odprla v novem oknu
ISSN: 0301-679X
Št. ogledov: 1125
Št. prenosov: 163
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: električni kontakti;baker;grafit;trenje;obraba;električni tok;
Vrsta dela (COBISS): Članek v reviji
Konec prepovedi (OpenAIRE): 2022-10-31
Strani: str. 192-205
Zvezek: ǂVol. ǂ126
Čas izdaje: Oct. 2018
DOI: 10.1016/j.triboint.2018.05.024
ID: 11053086