20.500.12556/RUL-183895 Tribološka analiza kontaktov mazanih z različnimi menjalniškimi olji pod vplivom električnega toka Tribological analysis of contacts lubricated with different gear oils under the influence of electric current Zaradi naraščajočega trenda elektrifikacije vozil in zahtev po boljših mehanskih izkoristkih morajo sodobno formulirana maziva ustrezati mnogim strožjim zahtevam. Na večnamenskem tribometru smo primerjali klasično menjalniško olje za vozila z motorji z notranjim zgorevanjem s specifičnimi transmisijskimi olji za hibridna in električna vozila. S pomočjo triboloških preizkusov pod vplivom električnega polja smo pridobili podatke o trenju in obrabi, nato pa smo vzpostavili povezave med pridobljenimi rezultati, lastnostmi maziv in električnim tokom. Ugotovili smo, da električni tok pomembno vpliva na mazanje kontakta in njegove tribološke lastnosti, zaradi izjemno majhne kontaktne površine pa je tam prisotna zelo visoka gostota električnega toka, ki ima uničujoč učinek na obrabo, predvsem pri nizkih obratovalnih hitrostih v področju mejnega mazalnega režima. Kljub bistveno nižjim viskoznostim formuliranih maziv jim lastnosti olj in specializiranih aditivov omogočajo primerljivo nadzorovanje trenja in stopnje obrabe, pri čemer ohranjajo najbolj enakomerno obrabo površine, tudi v najmanj ugodnem – mejnem mazalnem režimu. Due to the growing trend of vehicle electrification and demands for improved mechanical efficiency, modern formulated lubricants must meet various more stringent requirements. Using a multifunctional tribometer, a conventional transmission oil for internal combustion engine vehicles was compared with specific transmission fluids designed for hybrid and electric vehicles. Through tribological testing under the influence of an electric field, friction and wear data were acquired, after which correlations were established between the obtained results, lubricant properties, and electrical current. It was found that the electric current significantly affects the lubrication of the contact and its tribological properties. Due to the extremely small contact area, a very high electrical current density is present, which has a destructive effect on wear—particularly at low operating speeds within the boundary lubrication regime. Despite the significantly lower viscosities of the formulated lubricants, the properties of the base oils and specialized additives enable comparable control over friction and wear rate, while maintaining the most uniform surface wear, even in the least favorable boundary lubrication regime. maziva aditivi električno polje obraba koeficient trenja mejno mazanje lubricants additives electric fields wear friction coefficient boundary lubrication true false false [D. Mugerli] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-06-20 08:31:15 2026-06-20 08:31:36 2026-07-02 08:23:26 0000-00-00 00:00:00 2026 0 Ljubljana 0 XXIV, 60 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 21.892:537.212(043.2) 285754 283325699 47024.pdf 47024.pdf 1 714CC090BB37EB2C062562BFA9595CDD 562522402daaf942fcfc9620b811b6b8f4ef19c6fa9a3ae499027a81026fed00 a458914a-6c71-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=236205 Fakulteta za strojništvo 0 0 0