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Volume 14, September 2017, Pages 32-49
Influence of couple stress lubricants on hole-entry hybrid journal
bearings
Nathi Ram
Department of Mechanical & Automation Engineering, Indira Gandhi Delhi Technical University for Women. Kashmere Gate, Delhi-110006, India
Abstract
The analysis of symmetric and asymmetric hole-entry
hybrid journal bearings under couple stress lubrication is presented
in the present investigation. Equation of Reynolds theorem has been
modified for the couple stress lubricant’s flow in the journal and
bearing’s clearance space and Newton Raphson and finite element
techniques are used for solving this Reynolds equation. For
different parameter values of couple stress lubricant and for
external load, the outcomes are simulated. Presented result show
that at constant load for hybrid journal bearings, couple stress
lubricant influences the increase in the value of minimum thickness
of fluid film, coefficients of stiffness and damping. It is also
observed that for asymmetric bearing under couple stress lubricant,
the threshold speed value increases by 14.47% for lower external
load when operates couple stress parameter value 5 than similar
bearing under Newtonian lubricant.
Keywords
Fluid film bearings; Lubricants; Restrictors; Finite element technique
Full Text
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