Croatian Union of Mechanical Engineers and Naval Architects
Abstract
The occurrence of working irregularities in journal bearing such as loss
of geometry correctness, sudden failure of lubrication, overloading, etc.,
requires that serious damage of journal bearings have to be overcome
in a short period of time. In such cases, it is important that the applied
combinations of materials and lubricants do not have a tendency to
seizure. Such critical conditions were simulated in this work for various
combinations of materials and lubricants. Model research was carried out
using the adapted Timken device and results were compared with the real
loaded bearing. Data for nominal working conditions has shown relatively
good agreement with calculated values whereas maximum frictional
moment was significantly higher for the real bearing. This difference
was explained as a consequence of different lubricating conditions.
Nevertheless, a profile of the frictional moment was qualitatively similar
compared to a model testing for equal combination of material and
lubricant, thus confirming initial assumptions
