Archive > 2014 > March 2014 > Investigations of Bearing Failures Associated with White Etching Areas (WEAs) in Wind Turbine Gearboxes

Investigations of Bearing Failures Associated with White Etching Areas (WEAs) in Wind Turbine Gearboxes - March 2014

Robert Errichello, Robert Budny, Rainer Eckert

The article "Investigations of Bearing Failures Associated with White Etching Areas (WEAs) in Wind Turbine Gearboxes" appeared in the March 2014 issue of Power Transmission Engineering.

Summary
A critical problem for wind turbine gearboxes is failure of rolling element bearings where axial cracks form on the inner rings. This article presents field experience from operating wind turbines that compares the performance of through-hardened and carburized materials. It reveals that through-hardened bearings develop WEA/WECs and fail with axial cracks, whereas carburized bearings do not. The field experience further shows that a carburized bearing with a core having low carbon content, high nickel content, greater compressive residual stresses, and a higher amount of retained austenite provides higher fracture resistance and makes carburized bearings more durable than through-hardened bearings in the wind turbine environment.

Keywords
bearing failure, wind turbine gearboxes, wind turbines, white etching areas

The article "Investigations of Bearing Failures Associated with White Etching Areas (WEAs) in Wind Turbine Gearboxes" should appear in the box below, but if you do not see it, you can download it here.

It appears you don't have a PDF plugin for this browser. No biggie... you can click here to download the PDF file.