Bøger af Har (Consultant for Centre for Tribology Incorporated (Cetr) Campbell California USA) Prashad

This book brings out the solution to various complex technical problems of mechanical, tribology and engineering sciences concerning tribological studies in lubricants and additives including effect of electric current and influence of magnetic flux density on bearing surfaces. It also studies diagnosis and investigations of such cases those are closely associated with the significance of tribology in multifold applications. SALIENT FEATURES: 1.Different investigations, their analysis and solutions details, those are unique in nature. 2.Premature failure of bearings due to various unforeseen causes. 3.Details of theoretical and experimental analysis of magnetic flux density distribution as a diagnostic tool for critical failures of bearings. 4.Failure of bearings under localized electrical currents. 5.Causes of shaft voltages. 6.Life estimation of turbine oils, besides a non-conventional integral approach for testing of lubricating oils and effect of nano additives on lubricants. 7.Tribological studies causing bearing failures under the effect of electrical currents.

This book basically covers static and dynamicanalysis of different types of Hydrodynamic Journaland Thrust Bearings using Electrical Analogy in 7Chapters including that of start/stopcharacteristics, electrical parameters of bearings,capacitive and inductive effects under the effect ofshaft voltages.Theoretical procedure to establish, capacitance,resistance, capacitive reactance, impedance andcharge accumulation on surfaces of bearings is giventhat originates the new methodology for the diagnosisof bearings under electrical analogy. Also, thedecrease in life span of bearings under the influenceof different levels of shaft voltages has beenestablished theoretically, and the safe limit of theshaft voltage for a bearing has been identified. Thedynamic coefficients of the bearings have beendetermined using an electrical analogy approachbeside determination of minimum cycles before cratersare formed on the active surface of bearings.