Static and dynamic behaviors of a cylindrical hydrodynamic journal bearing operating at very low Sommerfeld numbers

  • Dang Phuoc Vinh
  • Steven ChattertonEmail author
  • Paolo Pennacchi
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 73)


Plain journal bearings are commonly equipping various rotating machineries from small electrical motors to large generators, turbines and pumps. They are preferable to rolling element bearings because of their long life performance, low cost, quiet operation, high damping properties, split design, and smaller outside dimension. In this paper the static and dynamic characteristics of a cylindrical journal bearing working in critical conditions, namely at very low speed and high specific pressure, are described. A bearing with the nominal diameter of 160mm and the length of 145mm was used. The rotational speed was fixed at very low speed of 60rpm while the applied static load in the vertical direction ranges in the Sommerfeld number from 0.0086 to 0.1314. Measurements of static position of the shaft, hydrodynamic pressure, temperature profiles, and dynamic coefficients have been presented and discussed.


Cylindrical journal bearing Low Sommerfeld number Experiments Static and dynamic characteristics 


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringThe University of Danang – Danang University of Science and TechnologyDa NangVietnam
  2. 2.Department of Mechanical EngineeringPolitecnico di MilanoMilanItaly

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