Closure to “Discussion of ‘Steady-State and Dynamic Properties of the Floating-Ring Journal Bearing’” (1968, ASME J. Lubr. Technol., 90, p. 661)

1968 ◽  
Vol 90 (3) ◽  
pp. 661-661
Author(s):  
F. K. Orcutt ◽  
C. W. Ng
Keyword(s):  
Steady State ◽  
Journal Bearing ◽  
Dynamic Properties

Steady-State and Dynamic Properties of the Floating-Ring Journal Bearing

1968 ◽  
Vol 90 (1) ◽  
pp. 243-253 ◽  
Author(s):  
F. K. Orcutt ◽  
C. W. Ng
Keyword(s):  
Steady State ◽  
Journal Bearing ◽  
Dynamic Properties ◽  
Calculated Data ◽  
Experimental Results ◽  
Supply Pressure ◽  
Pressure Parameter

Calculated data on steady-state and dynamic properties of the plain cylindrical floating-ring bearing with pressurized lubricant supply are given. The data are for a bearing with L/D of 1, and values of the ratio of inner to outer film clearances of 0.7 and 1.3. One value of dimensionless supply pressure parameter is covered. Experimental results are presented which verify the calculated results and which supplement them, particularly with respect to stability characteristics of the bearing.

Comparison of the Steady-State and Dynamic Performance of Two Fixed-Geometry Journal Bearings

2011 ◽  
Author(s):  
Martin J. Conlon ◽  
Azzedine Dadouche ◽  
Waldemar M. Dmochowski
Keyword(s):  
Steady State ◽  
Journal Bearing ◽  
Operating Temperature ◽  
Dynamic Properties ◽  
Dynamic Performance ◽  
Frequency Domain Analysis ◽  
Journal Bearings ◽  
Rotordynamic Coefficients ◽  
Cylindrical Bore ◽  
Mass Spring

This paper evaluates two different journal bearings: a cylindrical bore plain journal bearing and a tri-lobe taper land bearing. Each bearing has the same nominal diameter (89mm) and aspect ratio (L/D = 0.7). The shaft rotational speed ranged from 6krpm to 14krpm and the bearing specific load from 700kPa to 2800kPa. The bearings’ steady-state performance is evaluated according to relative bearing and shaft displacement, bearing operating temperature and power loss. A frequency-domain analysis is used to determine bearing rotordynamic coefficients — it treats the bearing as a mass-spring-damper system. Excitation frequencies range between 20Hz and 350Hz. Ultimately, the tri-lobe taper land bearing offers better stability whereas the cylindrical bore plain journal bearing has a lower eccentricity and runs cooler for a given operating condition. The dynamic properties of the two bearings are found to be similar, although the higher stability of the tri-lobe taper land bearing is also reflected in the dynamic coefficients.

The Effect of Lubricant Inertia in Journal-Bearing Lubrication

1957 ◽  
Vol 24 (4) ◽  
pp. 494-496
Author(s):  
J. F. Osterle ◽  
Y. T. Chou ◽  
E. A. Saibel
Keyword(s):  
Reynolds Number ◽  
Steady State ◽  
Reynolds Equation ◽  
Journal Bearing ◽  
Journal Bearings ◽  
Hydrodynamic Theory ◽  
Simple Relationship ◽  
Inertia Effect ◽  
Laminar Regime ◽  
Steady State Operation

Abstract The Reynolds equation of hydrodynamic theory, modified to take lubricant inertia into approximate account, is applied to the steady-state operation of journal bearings to determine the effect of lubricant inertia on the pressure developed in the lubricant. A simple relationship results, relating this “inertial” pressure to the Reynolds number of the flow. It is found that the inertia effect can be significant in the laminar regime.

An Investigation of the Steady-State Performance of a Pivoted Shoe Journal Bearing with ISO VG 32 and VG 68 Oils

2004 ◽  
Vol 47 (4) ◽  
pp. 480-488 ◽  
Author(s):  
Keith Brockwell ◽  
Waldemar Dmochowski ◽  
Scan Decamillo
Keyword(s):  
Steady State ◽  
Journal Bearing ◽  
Steady State Performance

Steady-State and dynamic properties of concentrated fiber-filled thermoplastics

1995 ◽  
Vol 35 (21) ◽  
pp. 1670-1681 ◽  
Author(s):  
Joseph P. Greene ◽  
James O. Wilkes
Keyword(s):  
Steady State ◽  
Dynamic Properties
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