Document Type
Thesis
Date of Award
12-31-1988
Degree Name
Master of Science in Mechanical Engineering - (M.S.)
Department
Mechanical Engineering
First Advisor
Avraham Harnoy
Second Advisor
Roman Dubrovsky
Third Advisor
Youngjin Park
Abstract
This study was undertaken with the view to determining experimentally the influence of polymer additives on journal bearing performance under static load. Viscoelastic lubricants such as oils with polymer additives are in common use and exhibit a reduced dependence of the viscosity on temperature but the effect on the performance of a static journal bearing is not clear. Additives of the polymer polyisobutylene and STP were blended with Newtonian base oil which was used to establish the baseline performance of the test bearing. A comparison was made between the performance of these blends and the base oil. The performance of the bearing was tested on the basis of comparing the friction factor versus the same fluid film geometry. An experimental technique and test machine have been developed to measure the minimum oil film thickness.
The results show that for high oil film thickness (small eccentricity) the polymer additives increased the friction factor. However for low oil film thickness (boundary lubrication) the polymer additives caused small improvement within the limits of measurement error.
Recommended Citation
Felzenstein, Moshe David, "Hydrodynamic lubrication performance of mineral oils with polymer additives" (1988). Theses. 3067.
https://digitalcommons.njit.edu/theses/3067
