Ali ABASABADARAB, Seyedalireza HOSSEİNİ, Mohammad ABASABADARAB, Reza ALLAHYARİ, Mahdi ESFAHANİATASHBEİK

The Effect of Non-linear Pivot Stiffness on Tilting Pad Bearing Dynamic Force Coefficients

Abstract. Journal bearings are used on a variety of different rotating and reciprocating machines to support shafts that are rotating inside a bearing. In contrast to anti-friction type bearings where the primary mechanism is rolling action of contacting components, journal bearings operate by supporting the load of the shaft on a pressurized oil film. Approach of this paper is to describe static and dynamic loads and dynamic characterizes that effect on fluid film thickness and enhance tilting pad bearing model by including nonlinear pivot flexibility for rocker, spherical, and flexure type pivots.

Keywords:

Tilting pad, Dynamic, Pivot, Static, force coefficient,

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Harris, J., and Childs, D., 2008, “Static Performance Characteristics and Rotor dynamic Coefficients for a Four-Pad Ball-In-Socket Tilting Pad Journal Bearing,” ASME Paper No. GT2008-5063.
San Andrés, L., 1996, “Turbulent Flow, Flexure-pivot Hybrid Bearings for Cryogenic Applications,” ASME J. Tribol., 118(1), pp. 190-200.
Kim, J., Palazzolo, A., and Gadangi, R., 1995, “Dynamic Characteristics of TEHD Tilt Pad Journal Bearing Simulation Including Multiple Mode Pad Flexibility Model,” ASME J. Vib. Acoustics, 117, pp. 123-135.
Lund, J. W., 1964, “Spring and Damping Coefficients for the Tilting-Pad Journal Bearing,” ASLE Trans., 7, 4, pp. 342-352.
Hagg, A. C., and Sankey, G. O., 1958, “Some Dynamic Properties of Oil-Film Journal Bearings with Reference to the Unbalance Vibration of Rotors,” ASME J. Appl. Mech., 25, 141. [6] Rouch, K. E., 1983, “Dynamics of Pivoted-Pad Journal Bearings, Including Pad Translation and Rotation Effects,” ASLE Trans., 26, 1, pp. 102-109.
“Tilting Pad Journal Bearings,” Rotech Engineering, [accessed 10 April 2008]
Zeidan, F.Y., 1992, “Developments in Fluid Film Bearing Technology,” Turbo machinery International, 9, pp. 24-31.