Prediction of Cavitation Failure in Crankpin Bearings

Document Type : Original Article

Author

Assistant Professor, Ph. D Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran

10.30699/ijrrs.2022.326201.1076

Abstract

Cavitation failure is a common failure in bearing shells. Due to the generation and immediate collapse of small gas bubbles, causing high pressure pulses, the bearing surface is being locally damaged. Cavitation failure is also observed in IC engines due to highly dynamic loading, oscillation of pins, turbulence of oil flow and other factors. In this paper, cavitation failure in crankpin bearing of an IC engine is studied. In order to calculate the bearing lubrication characteristic such as oil fill ratio and maximum oil film pressure, Elasto-Hydrodynamic Lubrication (EHL) method to consider the effect of stiffness of the bearing shell housing in the model is utilized that incorporates mass conserving algorithms. In order to investigate the effect of some design parameters, such as clearance height between shaft and bearing shell, oil supply temperature and pressure, and oil bore position, on the cavitation failure, a parametric study was also done. The results showed that the cavitation failure in crankpin bearing is not critical and it is slight.

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Articles in Press, Accepted Manuscript
Available Online from 24 May 2022
  • Receive Date: 24 January 2022
  • Revise Date: 09 May 2022
  • Accept Date: 24 May 2022
  • First Publish Date: 24 May 2022