Schaeffler Group has developed a new line of main shaft bearings with optimised features to specifically eliminate premature failures, reduce friction torque, increase lubricant life, and improve overall performance reliability.
Schaeffler began the optimisation process by analysing main bearing operating data from approximately 14,000 turbines. The recorded failure pattern (which included surface-initiated fatigue, abrasive wear and uneven internal load distribution in most of the observed turbines) was a real indication of the severity of the operating conditions. These findings led to an analytical investigation that culminated with several in-house development, testing, and validation of an entire new line of main bearings for the wind turbines. These designs provide:
- 67% increase of rating life with Asymmetric Spherical Roller Bearing
- 50% less axial movement of Asymmetric Spherical Roller Bearing
- 50% less axial movement of the planet carrier with Asymmetric Spherical Roller Bearing
- Upgrade of existing drive trains to higher output using Asymmetric Spherical Roller Bearing
- Advanced roller surface treatment to eliminate metal – metal contact
- Advanced surface treatment on inner ring bore for fretting corrosion prevention
- Optional lifting bolts for easy mounting / handling
