Project Background

The customer is a well-known domestic wind turbine manufacturer developing a new generation of 5MW onshore wind turbines, requiring a reliable main shaft bearing supplier to support development and volume supply.

Technical Challenges

Design life requirement: 20 years (175,000 hours)
Operating environment: Alternating loads, vibration and impact, temperature range of -40℃ to +50℃
Bearing outer diameter: Over 1200mm
Precision requirement: P5 grade or higher

Solution

Structural Design: A double-row spherical roller bearing structure was adopted, providing self-aligning capability to accommodate shaft deflection caused by wind loads.

Special Heat Treatment: A bainite isothermal quenching process was used to improve impact toughness and dimensional stability.

Surface Strengthening: The raceway surfaces were specially treated to improve resistance to micro-pitting.

Sealing Design: A multi-lip seal structure ensures effective protection in harsh environments.

Project Achievements

Successfully passed the customer's bench test and field operation validation
Achieved volume delivery capacity of more than 200 units per year
18 months of operation with zero failures