Author
Abstract
The critical speed of hyperbolic disks for the selected model is calculated
in three different cases, anisotropic material and thermal case, isotropic
material and thermal case finally isotropic material and thermal with
generated heat case. The second case is found to be the best because the
critical speed occurs above maximum speed values.
For recognition of the eccentricity (e) effects on the stability, the original
bearings of the selected model were tilting pads bearing replaced by
adjustable hydrodynamic pads bearing. The results proved that stability
criteria (Sc), critical mass (Mc), whirling frequency ratio ( - 2
fn ) of variable
rotational speed of the adjustable hydrodynamic pads bearing are stable for
the range of eccentricity (e) about 0.02 mm to 0.09 mm. Finally the
thermohydrodynamic (THD) analysis of eccentricity ratio (e) has effects on
the stability of the rotor-bearing system.
Keywords
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