Inertia Effect of the Fluid Particles on the Lubricant Flow in a Dynamic Thrust Bearings
Closed form equations are derived from the fundamental principles for the evaluation of volume flow rate of lubricant in between the pads of a thrust bearing accounting for the centrifugal inertia effect. Two types of configuration i.e. parallel disk and nonparallel disk configurations are considered. The theoretical analysis is presented.
Analyses of thrust bearings in scroll compressors considering keyways
This work is an attempt to calculate the lubricating characteristics of thrust bearings in scroll compressors, which have non-circular shapes due to the keyways cut for the Oldham's coupling. The outer shapes of these bearings are not circular because the keyways intrude the bearing boundaries. A boundary fitted coordinate technique for hydrodynamic lubrication is modified to handle this non-circularity. The pressure distributions, resultant forces and moments are calculated, which are in equilibrium to the typical conditions generated in the compressing processes. The changes of nominal clearance and tilting angles are obtained during one cycle under the assumption of rigid-body motions.
Enumeration of total coliforms, fecal coliforms, and Escherichia coli in foods by hydrophobic grid membrane filter: supplementary report.
Raw, comminuted poultry meat was used to determine the specificity of the media and incubation conditions used in the hydrophobic grid membrane filter method. Confirmation rates for target colonies were 100% for total coliforms, 98% for fecal coliforms, and 97-99% for Escherichia coli. The results of total coliform enumeration in 30 pasteurized milk samples by both the hydrophobic grid membrane filter method and AOAC method 46.013-46.016 are also reported.