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Please Using Microsoft Word Program Report In General About; HydroDynamic Journal Bearing Report Contents: 1- Abstract 2- Introduction 3- Body...

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Mechanical Engineering

Please Using Microsoft Word Program

Report In General About;
HydroDynamic Journal Bearing
Report Contents:
1- Abstract 2- Introduction
3- Body of Report 4- Conclusions
5- References

Answer & Explanation Solved by verified expert
4.0 Ratings (658 Votes)
Definition A journal bearing obtains its capacity to support an applied load through the resulting eccentric position of the shaft when subjected to rotation A journal under load shifts its location to an eccentric position inside the bearing sleeve that houses the shaft The pressure field created through eccentric rotation of the journal balances the change in momentum in the convergentdivergent sections of the fluid film hosted in the clearance between the journal and the sleeve This pressure when integrated in the axial and circumferential directions yields the loadcarrying capacity that the journal is capable of In a journal bearing the only source of pressure generation in the film is the eccentric rotation of the journal hence the synonym selfacting bearing To enhance the action of the shaft rotation in pressure generation the surface of the sleeve is sometimes shaped as a Rayleigh step a wavy surface or other momentumenhancing geometries Hydrodynamic bearings rely on bearing motion to suck fluid into the bearing and may have high friction and short life at speeds lower than design or during starts and stops An external pump or secondary bearing may be used for startup and shutdown to prevent damage to the hydrodynamic bearing A secondary bearing may have high friction and short operating life but good overall    See Answer
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