By: Marc Desjardins
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Detailing the theoretical
analysis of a full journal
bearing will be performed and
compared to the results
obtained by a computational
fluid dynamic (CFD) analysis.
Wear, it’s potential causes, and
prevention will be described
and complemented by a CFD
analysis of the effect of wear
severity and location on the
bearing performance and fluid
characteristics.
The analysis will suggest
possible system changes to
correct problems resulting
from wear.
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1. An in-depth explanation of lubrication and bearing theory and
the derivation of the some of the classical equations used in bearing
analysis.
2. A mathematical/theoretical analysis of a typical journal bearing
with known inputs (rotational speed, length, clearance, etc.).
3. The same journal bearing analyzed above will be modeled and
evaluated in COMSOL using a 2-dimensional fluid analysis. The
results of the COMSOL analysis will be then be compared to the
theoretical analysis.
4. The severity of wear will be varied to investigate the relationship
between material loss and load capacity, pressure, and fluid velocity.
5. The radial location of a constant wear area will be varied along
critical portions of the bearing to analyze the effect of wear location.
Wear Site
Fluid pressure in typical
journal bearing
Example of Modeling
Wear
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Wear Depth Vs Load Capacity, Maximum
Pressure and Velocity
Wear Location Vs Load Capacity, Maximum
Pressure, and Velocity
Potential system changes to reverse or negate
the impact of bearing wear will be analyzed
and suggested