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Behavior of Five-Pad Tilting–Pad Journal Bearings with Different Pivot Stiffness

  • Phuoc Vinh DangEmail author
  • Steven Chatterton
  • Paolo Pennacchi
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 554)

Abstract

In this paper, two different five-shoe tilting-pad journal bearings, namely rocker-backed pivot and spherical pivot with different pivot stiffness have been characterized with different working conditions. For the spherical pivot bearing, elastic shims and displacement restriction component are introduced to recognize the role of the variable stiffness of pivot. The copper is used for the material of the shim. An analysis of the dynamic behavior of the two bearings using a thermo-elasto-hydrodynamic model is presented first. This model considers the flexibility for both pad as well as pivot and a simple thermal model only for the fluid film temperature to accurately calculate the performance of bearings. The model also accounts for pivot stiffness of pads. The predicted dynamic coefficients of the two bearings were compared with the experimentally measured ones. The results show that the pivot stiffness or the pivot flexibility plays an important role in the dynamic coefficients estimation.

Keywords

Tilting-pad journal bearings Pivot stiffness Dynamic characteristics Thermo-elasto-hydrodynamic model Experimental tests 

References

  1. 1.
    Chen, S., Yang, S., Zhou, Q., Hou, Y., Lai, T.: Numerical study on tilting pad journal gas bearing with variable stiffness springs. J. Mech. Sci. Technol. 29(8), 3059–3067 (2015)CrossRefGoogle Scholar
  2. 2.
    San Andres, L., Tao, Y.: The role of pivot stiffness on the dynamic force coefficients of tilting pad journal bearings. J. Eng. Gas Turbines Power 135(11), 112505 (2013)CrossRefGoogle Scholar
  3. 3.
    Wilkes, J.C., Childs, D.W.: Tilting pad journal bearing - a discussion on stability calculation, frequency dependence, and pad and pivot. J. Eng. Gas Turbines Power 134(12), 122508 (2015)CrossRefGoogle Scholar
  4. 4.
    Feng, K., Liu, W., Zhang, Z., Zhang, T.: Theoretical model of flexure pivot tilting pad gas bearings with metal mesh dampers in parallel. Tribol. Int. 94, 26–38 (2016)CrossRefGoogle Scholar
  5. 5.
    Cha, M., Glavatskih, S.: Nonlinear dynamic behaviour of vertical and horizontal rotors in compliant liner tilting pad journal bearings: some design considerations. Tribol. Int. 82, 142–152 (2015)CrossRefGoogle Scholar
  6. 6.
    Kuznetsov, E., Glavatskih, S.: Dynamic characteristics of compliant journal bearings considering thermal effects. Tribol. Int. 94, 288–305 (2016)CrossRefGoogle Scholar
  7. 7.
    Dang, P.V., Chatterton, S., Pennacchi, P., Vania, A.: Effect of the load direction on non-nominal five-pad tilting-pad journal bearings. Tribol. Int. 98, 197–211 (2016)CrossRefGoogle Scholar
  8. 8.
    Dang, P.V., Chatterton, S., Pennacchi, P., Vania, A.: Numerical investigation of the effect of manufacturing errors in pads on the behaviour of tilting-pad journal bearings. Proc. Inst. Mech. Eng. Part J: J. Eng. Tribol. 233(4), 480–500 (2018)CrossRefGoogle Scholar
  9. 9.
    Dang, P.V., Chatterton, S., Pennacchi, P., Vania, A., Cangioli, F.: Behavior of a tilting–pad journal bearing with different load directions. In: ASME Paper No. DETC2015-46598, 8 (2015).  https://doi.org/10.1115/detc2015-46598
  10. 10.
    Dang, P.V., Chatterton, S., Pennacchi, P., Vania, A., Cangioli, F.: Behavior of tilting-pad journal bearings with large machining error on pads. In: ASME Turbo Expo, Paper No. GT GT2016-56674 (2016)Google Scholar
  11. 11.
    Chatterton, S., Dang, P.V., Pennacchi, P., Luca, A.D., Flumian, F.: Experimental evidence of a two-axial groove hydrodynamic journal bearing under severe operation conditions. Tribol. Int. 109, 416–427 (2017)CrossRefGoogle Scholar
  12. 12.
    Chatterton, S., Dang, P.V., Pennacchi, P., Vania, A.: A test rig for evaluating tilting–pad journal bearing characteristics. In: 9th International Conference on Rotor Dynamics IFToMM ICORD, Milan, Italy, pp. 921–930 (2014)Google Scholar
  13. 13.
    Kirk, R.G., Reedy, S.W.: Evaluation of pivot stiffness for typical tilting-pad journal bearing designs. J. Vib. Acoust. 10, 165–171 (1988)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringThe University of Danang - University of Science and TechnologyDanangVietnam
  2. 2.Department of Mechanical Engineering, Politecnico di MilanoMilanItaly

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