Development of Compound Bearing Concept for Wind Power Applications
Wind turbine gear boxes are plagued by pre-mature bearing failures. The failures exhibit a new type of failures with a common feature of a white etching crack system below the raceway. One suggested method to overcome these failures is to increase the strength of the raceway material. In this project a new bearing concept has been developed for high performance bearings. The bearings are fabricated by a powder metallurgical route where a high performance raceway material is Hot Isostatic Pressed (HIP) onto a cheaper core material. This enables to tailor properties such as toughness and residual stresses.