Preliminary communication
Study of Processes in Critical Operating Conditions of Sliding Pairs
Dragan Žeželj
orcid.org/0000-0001-5631-3928
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Stjepan Risović
; Faculty of Forestry, University of Zagreb, Zagreb, Croatia
Željko Marušić
; Faculty of Transport and Traffic Engineering, University of Zagreb, Zagreb, Croatia
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.
Keywords
Bearinig materials; Boundary lubrication; Journal bearing; Seizure; Static loading
Hrčak ID:
40364
URI
Publication date:
31.3.2008.
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