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Titlebook: Journal Bearings in Turbomachinery; D. M. Smith Book 1969 David Macleish Smith 1969 Europe.correlation.design.development.engine.future.ma

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Observed Bearing Performancere rise, and bearing loss, for which the designer has to allow considerable margins. The oil to be used in a lubricating-oil system is normally specified as being of a standard grade; but the standard specification defines only maximum and minimum viscosities at certain temperatures (Appendix VI).
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Conventional Theory of Linearized Dynamic Characteristics with Laminar Flowaxis and examining the superimposed disturbance forces which correspond to the journal motion. Additional assumptions are made to enable the dynamic characteristics to be expressed in a linearized form which can be conveniently calculated. The accuracy of these assumptions is considered.
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Influence of Bearings in Turbomachinery Vibrationing characteristics the disturbance forces include velocity components which are of the same order of magnitude as the displacement components, giving high damping. Additional complications arise from the nonreciprocal property of the displacement components and from the nonlinearity of the characteristics.
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Similarity Rules, Flow Regimes, and Characteristic Relationsential variation of clearance; for example, the ellipticity ratio of an ‘elliptical’ bearing. The profile of the grooves, and the numerical value of the clearance ratio, do not enter into the specified design. The clearance ratio and the operating conditions are covered by the duty parameter.
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Bearing Development and Bearing TheoryJournal bearings had centuries of development by empirical methods before there was any realization of the nature of the physical action by which a hydrodynamic lubricating film is formed. Empirical methods still retain an important place in journal-bearing development.
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