Influence of wear on the performance of a 2-lobe multirecess hybrid journal bearing system compensated with membrane restrictor

Abstract In the present paper, an analytical study concerning the influence of wear on the performance of a membrane compensated 2-lobe four-pocket hybrid journal bearing system has been presented. The modified Reynolds equation governing the flow of lubricant in the clearance space of a journal bearing system was solved using FEM and Newton–Raphson method. The numerically simulated results clearly indicates that the performance of the bearing is greatly affected by wear. A judicious selection of parameters such as δ, δ ¯ w and C ¯ m may provide better bearing performance.

[1]  Yeon-Pun Chang,et al.  Modified predictions of restriction coefficient and flow resistance for membrane-type restrictors in hydrostatic bearing by using regression , 2007 .

[2]  R. Flack,et al.  Effects of Three-Lobe Bearing Geometries on Rigid-Rotor Stability , 1982 .

[3]  Luis San Andrés,et al.  Performance of Damaged Hydrostatic Bearings: Predictions Versus Experiments , 2003 .

[4]  Dara W. Childs,et al.  Measurements of Rotordynamic Coefficients of Hybrid Bearings With (a) a Plugged Orifice, and (b) a Worn Land Surface , 2002 .

[5]  R. Sinhasan,et al.  Analytical study of a flexible hybrid journal bearing system using different flow control devices , 1992 .

[6]  M. K. Ghosh,et al.  Rotordynamic characteristics of multilobe hybrid bearings with short sills-part I , 2003 .

[7]  R. Sinhasan,et al.  Performance characteristics of multirecess hydrostatic/ hybrid flexible journal bearing with membrane type variable-flow restrictor as compensating elements , 1992 .

[8]  W. B. Rowe,et al.  Hybrid journal bearings with particular reference to hole-entry configurations , 1982 .

[9]  J. H. Vohr,et al.  Hydrostatic Bearings for Cryogenic Rocket Engine Turbopumps , 1969 .

[10]  R. Cook,et al.  Concepts and Applications of Finite Element Analysis , 1974 .

[11]  J. F. Booker,et al.  Effect of Surface Ellipticity on Dynamically Loaded Cylindrical Bearings , 1983 .

[12]  M. K. Ghosh,et al.  Stability of multilobe hybrid bearing with short sills—part II , 2003 .

[13]  Michel Fillon,et al.  Influence of Wear on the Behavior of a Two-Lobe Hydrodynamic Journal Bearing Subjected to Numerous Startups and Stops , 2006 .

[14]  G. Boothroyd,et al.  Advances in machine tool design and research: S. A. Tobias and F. Koenigsberger: Proceedings of the 9th International M.T.D.R. Conference, University Birmingham, September (1968). 1324 pages. Pergamon Press, Oxford, 1969 , 1970 .

[15]  J. K. Scharrer,et al.  The Effects of Wear on the Rotordynamic Coefficients of a Hydrostatic Journal Bearing , 1991 .

[16]  Satish C. Sharma,et al.  Performance of worn non-recessed hole-entry hybrid journal bearings , 2007 .

[17]  J. W. Kannel,et al.  Wear of Steam Turbine Journal Bearings at Low Operating Speeds , 1983 .

[18]  Hiromu Hashimoto,et al.  Performance Characteristics of Worn Journal Bearings in Both Laminar and Turbulent Regimes. Part I: Steady-State Characteristics , 1986 .

[19]  Sapna Mishra,et al.  Stability of a rigid rotor in turbulent hydrodynamic worn journal bearings , 1996 .

[20]  S. Malkin,et al.  Wear mechanisms of statically loaded hydrodynamic bearings by contaminant abrasive particles , 1981 .

[21]  Satish C. Sharma,et al.  Finite element analysis of orifice-compensated multiple hole-entry worn hybrid journal bearing , 2006 .

[22]  Satish C. Sharma,et al.  Performance of membrane compensated multirecess hydrostatic/hybrid flexible journal bearing system considering various recess shapes , 2004 .

[23]  Satish C. Sharma,et al.  Performance characteristics of an externally pressurized capillary-compensated flexible journal bearing , 1989 .

[24]  A D Rahmatabadi,et al.  Micropolar lubricant effects on the performance of noncircular lobed bearings , 2010 .

[25]  Janusz Piechna,et al.  Calculation of High Speed Multilobe Journal Bearings , 2005 .

[26]  P. Wong,et al.  Effect of geometry change of rough point contact due to lubricated sliding wear on lubrication , 1998 .

[27]  C. S. Lee,et al.  Stability of profile bore bearings: influence of bearing type selection , 1980 .

[28]  Theo G. Keith,et al.  Performance characteristics of cavitated noncircular journal bearings in the turbulent flow regime , 1991 .

[29]  E. A. Muijderman,et al.  Load capacity of multi-recess hydrostatic journal bearings at high eccentricities , 1986 .

[30]  Michel Fillon,et al.  Thermohydrodynamic analysis of a worn plain journal bearing , 2004 .

[31]  R. Sinhasan,et al.  Performance Characteristics of Externally Pressurized Orifice Compensated Flexible Journal Bearing , 1991 .