Micro Pitting on Rolling Bearings II

 

The influence of support and lubricant on the formation of micro pitting on rolling bearings

  Pitting damage to a radial cylindrical roller bearing at the edge of a surface area covered with micro pitting Copyright: MSE Pitting damage to a radial cylindrical roller bearing at the edge of a surface area covered with micro pitting

Motivation

Rolling bearings in highly dynamic applications, such as in wind turbines, can show damage in the form of micro pitting that cannot be predicted by classic rolling bearing fatigue theory. Micro pitting is a symptom of fatigue that can indirectly result in failure of the affected machine element. The mechanisms that lead to the formation of micro pitting on rolling bearings are only poorly understood to date.

Research objectives

  • Evaluation of the micro pitting resistance of lubricants for use in rolling bearings with different kinematics and cycle frequencies.
  • Attainment of an advanced understanding of the mechanisms for micro pitting, supported by two-disc experiments and simulations.
  • High-resolution, micro-analytical investigations of the near-surface area with the objective of establishing correlations between the occurrence of micro pitting and the composition and structure of tribological boundary layers
  • Derivation of an extended damage hypothesis for micro pitting in roller bearings

Research and project partners

  • RWTH Aachen University Institute for Machine Elements and System Engineering, MSE formerly IME
  • Institute of Machine Design, IMK, OvGU Magdeburg
  • Natural Scientific and Medical Institute NMI at the University of Tübingen
  BMWi Logo Copyright: BMWi

Promoted by

Federal Ministry for Economic Affairs and Energy

  Aif, FVA  Logo Copyright: AIF FVA

Project Sponsor

Arbeitsgemeinschaft industrieller Forschungsvereinigungen e.V., AiF for short

Research Association for Drive Technology, FVA for short