Lubricant of polymer gears using lubricating grease

Zobniki iz polimernih materialov se že nekaj časa uporabljajo kot alternativa kovinskim zobnikom v številnih industrijah in za celo vrsto različih aplikacij. Mazanje predstavlja enega izmed najpomembnejših dejavnikov, ki vplivajo na učinkovitost delovanja in življenjsko dobo polimerih zobnikov. V okviru te zaključne naloge smo se poglobili v vplive mazalnih masti na obnašanje polimernih zobnikov in materialov med obratovanjem. V laboratoriju smo na modelnem tribometru opravili eksperiment pri katerem smo testirali vpliv kontakta polimerne kroglice in jeklenega diska na koeficient trenja med obratovanjem pri dveh različnih obratovalnih hitrostih, visoki in nizki, ki se razlikujeta za faktor deset. Pri tem smo za mazanje kontaktne površine uporabili dve različni masti, ki sta namenjeni mazanju polimernih materialov in sta narejeni iz različnega baznega olja in zgoščevalnega sredstva. Ugotovili smo, da imata v pogojih delovanja, ki smo jih določili obe masti zelo podoben vpliv na koeficient trenja, ko se razmere ustalijo.Gears made of polymer materials have been used as an alternative to metal gears in many industries and for a whole range of different applications for quite some time. Lubrication represents one of the most important factors that affect operating efficiency and service life of polymer gears. In this bachelor thesis, we delved into the effects lubricating greases have on the behavior of polymer gears and materials during operation. An experiment was conducted using model tribometer in which we tested the effect of the contact between polymer ball and a steel disk on the coefficient of friction during operation at two different operating speeds, one high and one low, which differ by a factor of ten. We used two different lubricating greases for contact lubrication, both intended for lubrication of polymer materials but made of different base oil and thickener type. We found that under predetermined operating conditions, both greases show similar effect on the coefficient of friction after the conditions stabilize