The three-lobe bearings widely used in rotating machinery follow the design data evaluated using numerical methods for the solution of the Reynolds equation. This paper defines exact and approximate analytical solutions of the Reynolds equation for the case of three-lobe bearings with finite length. Dynamic characteristics are provided analytically with closed-form expressions for laminar regimes of operation, using an approximate analytical solution that proves to be reliable and of low cost of evaluation time. The results for eccentricity ratio, equilibrium locus, stiffness and damping coefficients are presented for a range of Sommerfeld number and different cases of load orientation and compared with theoretical and experimental data from the literature.
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October 2015
Research-Article
Analytical Evaluation of the Static and Dynamic Characteristics of Three-Lobe Journal Bearings With Finite Length
Athanasios Chasalevris
Athanasios Chasalevris
1
Mem. ASME
CSBPP—Core Science Bearings
Preventive Acoustics,
e-mail:
CSBPP—Core Science Bearings
Preventive Acoustics,
BorgWarner Turbo Systems Engineering GmbH
,Marnheimer Strasse 85/87
,Kirchheimbolanden 67292
, Germany
e-mail:
chasalevris@sdy.tu-darmstadt.de
1Present address: ALSTOM Power/Industrial Steam Turbine Engineering, Rugby CV1 2UE, UK.
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Athanasios Chasalevris
Mem. ASME
CSBPP—Core Science Bearings
Preventive Acoustics,
e-mail:
CSBPP—Core Science Bearings
Preventive Acoustics,
BorgWarner Turbo Systems Engineering GmbH
,Marnheimer Strasse 85/87
,Kirchheimbolanden 67292
, Germany
e-mail:
chasalevris@sdy.tu-darmstadt.de
1Present address: ALSTOM Power/Industrial Steam Turbine Engineering, Rugby CV1 2UE, UK.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received October 7, 2014; final manuscript received March 9, 2015; published online May 6, 2015. Assoc. Editor: Bugra Ertas.
J. Tribol. Oct 2015, 137(4): 041701 (16 pages)
Published Online: October 1, 2015
Article history
Received:
October 7, 2014
Revision Received:
March 9, 2015
Online:
May 6, 2015
Citation
Chasalevris, A. (October 1, 2015). "Analytical Evaluation of the Static and Dynamic Characteristics of Three-Lobe Journal Bearings With Finite Length." ASME. J. Tribol. October 2015; 137(4): 041701. https://doi.org/10.1115/1.4030023
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