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Ch-12 Lubrication and Journal Bearing
3/3/2013
United Arab Emirates University College of Engineering Department of Mechanical Engineering Machine Design 2 MECH 412
Chapter 12 Lubrication and Journal Bearings
Prepared by
Dr. Abdel-Hamid I. Mourad MechanicalEngineering Department UAE University
MECH 412
Dr. A-H. I. Mourad
1
MECH 412
Dr. A-H. I. Mourad
2
1
Ch-12 Lubrication and Journal Bearing
3/3/2013
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The object of lubrication is to……………
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A lubricant is…………….
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In a sleeve bearing, a shaft, or journal, rotates or oscillates within a sleeve, or bushing, and the relative motion is ….
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In an antifriction bearing, the main relative motion is…..
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Gear teeth mate with each other by a combination of ……and….
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The field of application for journal bearings is immense.
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The crankshaft and connecting-rod bearings of an automotive engine… The journal bearings used in the steam turbines of power-generating stations ……. At the other extreme there are thousands of applications in which the loads are light and the service relatively unimportant; a simple, easily installed bearing is required, using little or no lubrication. MECH 412
Dr. A-H. I. Mourad
3
12-1 Types of Lubrication Five distinct forms of lubrication may be identified: 1. Hydrodynamic 2. Hydrostatic 3. Elastohydrodynamic 4. Boundary 5. Solid film
