OIL FILM PRESSURE OF JOURNAL BEARING WITH OIL SUPLY HOLE LOCATED IN THE HOUSING CONCERNING CAVITATION

Abstract

During the operating, the lubricated oil film pressure of hydrodynamic
bearing is varied under the load apply and under the rotation speed. This
pressure is one important characteristic when studying the lubrication problem
for the bearing. An experimental device and the journal bearing are used to
determine the pressure and the temperature of the lubricated oil film. The load is
applied on the housing bearing. The journal bearing is subjected to different
applied load at different velocities. Lubricant oil is circulatingly supplied via oil
supply hole in the housing. The oil film pressure is calculated by numerical
modelization with Reynolds condition taking into account cavitation and also
experimental measured by the pressure sensor with the same applied load. The
calculated pressure and measured pressure of the oil film are agreement with
the applied load. The calculated oil film pressure is corresponded to the
measured pressure; however, the two types of results have a difference in value.
As the load increase, the difference between the numerical modelization results
and experimental results of maximum pressure increase significantly. When the
rotation speed increases, the maximum pressure decreases, the minimum
pressure in calculating increases and minimum pressure in experimenting is
slightly varied.