scholarly journals Research on Discontinuity of Lubricant Film in Journal Bearings : 1st Report, Bearing Characteristics and Lubricant Film Rupture

1967 ◽  
Vol 10 (42) ◽  
pp. 1039-1047 ◽  
Author(s):  
Haruo MORI ◽  
Seiji MIYATA ◽  
Yasuo ABE ◽  
Yoshio FUJITA
Keyword(s):  
Journal Bearings ◽  
Lubricant Film ◽  
Film Rupture

scholarly journals The Prediction of Liquid Film Journal Bearing Performance with a Consideration of Lubricant Film Reformation: Part 1: Theoretical Results

1985 ◽  
Vol 199 (2) ◽  
pp. 95-102 ◽  
Author(s):  
D Dowson ◽  
C M Taylor ◽  
A A S Miranda
Keyword(s):  
Liquid Film ◽  
Journal Bearing ◽  
Journal Bearings ◽  
Lubricant Film ◽  
Supply Rate ◽  
Film Rupture ◽  
Supply Pressure ◽  
Wide Range ◽  
The Reformation ◽  
Theoretical Results

Analyses of liquid film journal bearings rarely consider the reformation of the lubricant film. This reformation normally takes place in the vicinity of a supply groove and is influenced by, amongst other parameters, the lubricant supply pressure. In a previous paper the authors have described in detail the implementation of an algorithm to locate automatically and efficiently the locus of film rupture and reformation boundaries using a digital computer. In the present paper results are presented for a wide range of important variables. In particular, the prediction of lubricant supply rate is studied carefully and compared with data presented in a widely used design aid which does not account in detail for the influence of film reformation.

On the Appearance of Lubricant Film Rupture in Cylindrical Journal Bearings

2004 ◽  
Vol 47 (2) ◽  
pp. 233-238 ◽  
Author(s):  
Valery R. Nosov ◽  
J. Gomez-Mancilla
Keyword(s):  
Journal Bearings ◽  
Lubricant Film ◽  
Film Rupture

The Effect of Journal Bearing Misalignment on Load and Cavitation for Non-Newtonian Lubricants

1986 ◽  
Vol 108 (4) ◽  
pp. 645-654 ◽  
Author(s):  
R. H. Buckholz ◽  
J. F. Lin
Keyword(s):  
Reynolds Equation ◽  
Numerical Solutions ◽  
Journal Bearings ◽  
Surface Boundary ◽  
Film Rupture ◽  
Aspect Ratios ◽  
Free Surface Boundary Condition ◽  
Load Carrying ◽  
Boundary Location ◽  
Surface Boundary Condition

An analysis for hydrodynamic, non-Newtonian lubrication of misaligned journal bearings is given. The hydrodynamic load-carrying capacity for partial arc journal bearings lubricated by power-law, non-Newtonian fluids is calculated for small valves of the bearing aspect ratios. These results are compared with: numerical solutions to the non-Newtonian modified Reynolds equation, with Ocvirk’s experimental results for misaligned bearings, and with other numerical simulations. The cavitation (i.e., film rupture) boundary location is calculated using the Reynolds’ free-surface, boundary condition.

Research Report 4: A New Flow Visualization Apparatus for Studying Journal Bearing Lubrication

1966 ◽  
Vol 181 (2) ◽  
pp. 148-152
Author(s):  
H. H. Heath ◽  
J. W. Midgley ◽  
C. P. Smith
Keyword(s):  
Flow Visualization ◽  
Journal Bearing ◽  
Journal Bearings ◽  
Lubricant Film ◽  
Research Report ◽  
Complex Nature ◽  
Powerful Technique ◽  
Bearing Sleeve

Flow Visualization of the lubricant film in bearings has proved to be a powerful technique for revealing the complex nature of cavitation, a phenomenon not readily studied by other means. The method has been exploited by Cole and Hughes (I)† and others to obtain valuable information on the cavitation in journal bearings, viewing the lubricant through a glass bearing sleeve. This approach has the advantage that it is easy to apply, but it has limitations. In particular the effects of bearing deformation and of irregularities in bearing shape, e.g. mismatch of the two halves of a split bearing, are not readily simulated and the behaviour of heavily loaded bearings cannot easily be studied.

On the Performance of Journal Bearings Under Conditions of Film Rupture, Part I

1975 ◽  
Vol 97 (4) ◽  
pp. 585-590 ◽  
Author(s):  
W. A. Crosby ◽  
E. M. Badawy
Keyword(s):  
Boundary Condition ◽  
Journal Bearings ◽  
Film Rupture ◽  
Separation Line ◽  
Cavity Profile ◽  
Rupture Part ◽  
Different Depths

A model of film rupture taking into account both the finger-pattern and the flow carried away over and/or under the cavity is considered. A tractable boundary condition is derived by assuming that the Reynolds flow is retained in the vicinity of the cavity. The pressure isobars and cavity profile are shown at different depths of the clearance space. Thus, the shape of the separation line is obtained. A modification is suggested so that the boundary condition may accommodate the occurrence of cavitation at higher loads.

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