STRIBECK CURVE FOR LUBRICANTS BASED ON RAPESEED OIL

Lorena DELEANU, Constantin GEORGESCU, Dionis GUGLEA, George Ghiocel OJOC, George Cătălin CRISTEA

Abstract


This paper presents a discussion on tribological behavior of rapeseed oil, additivated or not, taking into account the Stribeck organization of information. Tests were carried out on a four-ball machine. The following parameters were analyzed: friction coefficient, average diameter of wear scars on the three fixed balls and lubricant temperature at the end of the test. Test parameters were: the normal load on main shaft of the four-ball machine from 100 N to 300 N, and the rotational speed of the main shaft (600 rpm to 2200 rpm, corresponding to a sliding velocity of 0.23 m/s to 0.84 m/s, respectively). There were plotted Stribeck curves based of Stribeck parameter (depending on velocity, lubricant viscosity and applied load). Lubrication regimes could be easily identified on these curves and, based on this information, recommendations for using rapeseed oil, additivated or not, could be formulated.

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