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A Comparison of Design Methodologies for Journal Bearings under Pulsatile Loads

Herapath, Colin, Barrans, S M and Weston, W (2011) A Comparison of Design Methodologies for Journal Bearings under Pulsatile Loads. In: International Conference on Renewable Energies and Power Quality (ICREPQ'11), 13-15 April 2011, Las Palmas de Gran Canaria, Spain.

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The paper expands the work by Kinnear and Weston[1] on squeeze film bearing design to the general case and compares the revised methodology with classical bearing design[2,3,4] and hybrid bearing design[5]. The analysis, which employs a partial differentiation of the Poisseuille and Hagen-Poiseuille bearing flow equations, enables a mathematical model for the bearing squeeze film to be developed. This yields a transfer function between bearing displacement and load. Subsequent parameter maps are developed from the transfer function for stiffness and damping coefficients.The method enables hybrid journal bearings under pulsatile load to be considered. Current design methodologies employed do not cater for this situation adequately which limits effective design of these bearings in applications such as in internal combustion engine crankshaft bearings.

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Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Hybrid bearings, Squeeze film effect, Power savings, Friction losses, ic engine bearings
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Schools: School of Computing and Engineering
School of Computing and Engineering > Centre for Precision Technologies > Engineering Control and Machine Performance Research Group
School of Computing and Engineering > Pedagogical Research Group
Related URLs:
References: [1] Kinnear, D. and Weston, W. ‘A Design Methodology for the Prediction and Measurement of Squeeze Film Stiffness and Damping in Hybrid Journal Bearings under Pulsatile Load Conditions’. 10th Int .Conf. on Renewable Energy and Power Quality, Granada(Spain), March2010. [2] Schlichting,K. & Gerston,K ‘Boundary Layer Theory’,8th edition 2009, Springer, ISBN 3-540-66270-7. [3] Hamrock,R.J.,Schmid,S.R. & Jacobson,B.O. ‘Fundamentals of Fluid Film Lubrication’, Marcel Dekkar Inc., ISBN 0-8247-5371-2 [4]BP Publication, Lubrication Theory and its Application, BP Trading Limited, London, 1969. [5]Rowe,W.B.,’Hydrostatic Bearing Design’Butterworths, ISBN 0-408-01324-9. [5]Rowe,W.B.,Xu,S.X., Chong,F.S. and Weston,W., ‘Hybrid Journal Bearings with particular reference to hole entry configurations’, Tribology International. Vol.15, pp339-48. [6]Koshal,D. and Rowe,W.B., ‘Fluid Film Journal Bearings operating in a Hybrid Mode: PartI – Theoretical Analysis and Design’, Journal of Lubrication Technology, ASME, Vol.103,pp558 – 65, October 1981. [7]Koshal,D. and Rowe,W.B., ‘Fluid Film Journal Bearings operating in a Hybrid Mode: PartII – Experimental Investigation’ Journal of Lubrication Technology, ASME, Vol.103,pp565-72, October 1981. [8]Rowe,W.B., Weston,W. And Koshal,,D., ‘Static and Dynamic properties of Concentric Hybrid Journal Bearings by Small Displacement Analysis’, Euromech Conference on Hydrodynamic Lubrication of Bearings, Fiat, Turin, Oct. 1979. [9]Michell,A.G.M., Transactions ASME, Sept. – Dec.1929, pp153 – 163. [10]Dubois,G.B. and Ocvirk,F.W., ‘Analytical Derivation and Experimental Evaluation of Short Bearing Approximation for Full Journal Bearings’, NACA report 1157, 1953.
Depositing User: Simon Barrans
Date Deposited: 26 Apr 2011 09:02
Last Modified: 28 Aug 2021 21:32


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