| dc.description.abstract | Maximum temperature rise is one of the design criteria for a journal bearing. It implies that the
difference between the maximum allowable journal bearing temperature and the ambient temperature is
constant. On the other hand, minimum lubricating oil film thickness is another design criteria for a
journal bearing. Therefore we can establish a correlation between the minimum film thickness and the
ambient temperature for a given lubricating oil in a journal bearing. In this thesis, we took the minimum
oil film thickness recommended by Trumpler (known as Trumpler’s criteria) as the performance
parameter for the journal bearing. Then we evaluated the performance of different lubricating oils used
in journal bearings with respect to journal bearing diameter, length to diameter ratio, clearance to
diameter ratio, rotational speed and load. We conducted this evaluation for three different kinds of
journal bearings: natural fed, pressure fed and self contained journal bearings. Through this study, we
investigated whether lubricating oil recommended by the machinery manufacturer after being tested in
the machinery manufacturer’s ambient temperature delivers acceptable performance in the user’s
ambient temperature. | en_US |
