OPERATING CONDITIONS OF SLIDE BEARINGS OF MILLS USED IN KGHM POLSKA MIEDŹ S.A.
2016
The paper contains the results from a tec
hnical analysis of the conditions of the
operation of hydrodynamic bearings supporting the drums of ore processing
mills at KGHM Polska Mied
ź
S.A. A theoretical analysis was performed on the
grounds of onsite examination and measurem
ents of principal dimensions of the
bearings of interest. The computer simulation covered the characteristics of the
oil film in the bearings as a function of bearing clearance, load, lubricant
viscosity, and journal tilting in relation to
two planes (horizontal and vertical).
The results of the analysis indicate that
the bearings currently operate close
to maximum capacity and that there is a significant deflection of the bearing
journals under the applied joint load of
the drum’s own weight and the process
load of grinders and slurry. The current extent of tilting can cause oil film
breakage at the bearing’s edge. The result of calculations amended by bearings’
examination and measurements allowe
d the formulations of conclusions
regarding the current state of the bearings and evaluated load conditions.
Guidelines were established for late
r developments in the capacity and
reliability of the bearings.
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