Effect of Load Orientation on the Performance of an Inverted Three-Lobe Pressure dam Bearing

Abstract:

Sometimes the line of action of the load does not pass through the axis of a bearing and is shifted on either side by a few degrees. The effect of load orientation on the stability of an inverted three-lobe pressure dam bearing has been studied in this paper. An inverted three lobe pressure dam bearing is produced by incorporating two pressure dams in the upper two lobes and one relief track in the lower lobe. The result shows that stability of an inverted three-lobe pressure dam bearing supporting either rigid or flexible rotor is increased for the positive values of load orientation i.e. when the load line is shifted in the opposite direction of rotation.

• Periodical: Advanced Materials Research (Volume 365)
• Pages: 83-88
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.365.83
• Online since: October 2011
• Authors: N.K. Batra, Gian Bhushan, N.P. Mehta
• Keywords: Finite Element Method (FEM), Inverted Three-Lobe Pressure dam Bearing, Multi-Lobes

References

[1] O. Pinkus, Analysis and Characteristics of Three-Lobe Bearings, ASME Journal of Basic Engineering, vol. 81, (1959. ) , p.19.

[2] J. W. Lund, and K. K. Thomson, A Calculation Method and Data for the Dynamic Coefficients of Oil Lubricated Journal Bearings, Proceedings of the ASME Design and Engineering Conference, Minneapolis, (1978) p.1.

[3] M. Malik, Mahesh Chandra and R. Sinhasan, Design Data for Offset-Halves Journal Bearings in Laminar and Turbulent Flow Regimes, ASLE Trans., (1982), pp.133-140.

DOI: 10.1080/05698198208983075

[4] N. P. Mehta, A. Singh, and B. K. Gupta, Dynamic Analysis of Finite Half-Elliptical Pressure Dam Bearings with Rotor Flexibility Effects, ASLE Trans., vol. 29, no. 1, ( 1986) pp.61-66.

DOI: 10.1080/05698198608981660

[5] J. C. Nicholas and Allaire, P.E., Analysis of Step Journal Bearings- Finite Length Stability, ASLE Trans., (1980), pp.197-207.

[6] J. C. Nicholas, L. E. Barrett, and M. E. Leader, Experimental – Theoretical Comparison of Instability Onset Speeds for a Three Mass Rotor Supported by Step Journal Bearing, Trans. ASME, Journal of Mechanical Design, ( 1980) pp.344-351.

DOI: 10.1115/1.3254750

[7] R. D. Flack, M. E. Leader, and E. J. Gunter, An Experimental Investigation on the Response of a Flexible Rotor Mounted in Pressure Dam Bearings, Trans. ASME, Journal of Mechanical Design, (1980), pp.842-850.

DOI: 10.1115/1.3254831

[8] N. P. Mehta, and S. S. Rattan, Performance of Three-Lobe Pressure Dam Bearings, Wear, (1993), pp.181-185.

DOI: 10.1016/0043-1648(93)90323-e

[9] N. P. Mehta, S. S. Rattan and G. Bhushan, Static and Dynamic Characteristics of Four-Lobe Pressure Dam Bearings, Tribology Letters, vol. 15, no. 4, (2003), pp.415-420.

DOI: 10.1023/b:tril.0000003067.33680.11

[10] N.P. Mehta, S.S. Rattan, and Rajiv Verma, Stability Analysis of Two Lobe Hydrodynamic Journal Bearing With Couple Stress Lubricant, ARPN Journal of Engg. And Applied Sciences, vol. 5, no1, (2010), pp.69-74.

[11] G. Bhushan, S. S. Rattan, and N. P. Mehta, Stability Analysis of Four-Lobe Pressure Dam bearings, Tribology Letters, vol. 13, no. 1, (2002) pp.1-7.

[12] Malik, R. Sinhasan and M. Chandra, A Comparative Study of Some Three-lobe Bearing Configurations, Wear, (1981), pp.277-286.

DOI: 10.1016/0043-1648(81)90254-4

[13] Booker, G.F. and Hubner, K.H., Application of Finite Elements to Lubrication: An Engineering Approach, Trans ASME, Journal of Lubrication Technology, (1972), pp.313-323.

DOI: 10.1115/1.3451719

[14] J .F. Booker and P.K. Goenka, Spherical Bearings: Static and Dynamic Analysis via the Finite Element Method, Trans. ASME J. Lub. Technology, (1980).

DOI: 10.1115/1.3251522

[15] E .J. Hahn, The Excitability of Flexibility Rotors in Short Sleeve Bearings, Trans. ASME Journal of. Lubrication Technology, (1975), pp.196-205.