N. M. Ashour
Faculty Engineering, Mataria, Cairo, Helwan University, Egypt
On large thrust bearings, the geometry of the bearing pad surface is affected appreciably by
deformation. In a spring supported thrust pad bearing, the deformation caused by the
generated pressure and thermal gradient yields surface profiles of opposite shapes. The
thermoelastic analysis performed here makes it possible to determine the resultant film shape
of the thrust pad. The full-scale heat transfer is incorporated the analysis. The heat balance is
presented and the influence of Nusselt number of the hot oil carry over factor is considered.
The governing equations are converted by means of finite difference method and solved
numerically. An iterative procedure is used to solve the pressure and thermal equations
without recourse to an effective operating temperature. The deformation is estimated from
the solution of bending equation including the thermal term using matrix method. The
obtained results show that the improvement of the hydrodynamic action of the bearing as a
function of the thermal aspects.
Keywords: spring-supported thrust bearings, thermo-hydrodynamic lubrication, pad
deformation, finite difference method, matrix method.