Breakthroughs in Domestic Wind Turbine Bearings Technology

Breakthroughs in Domestic Wind Turbine Bearings Technology

In recent years, significant advancements have been made in wind turbine bearing technology. Regarded as one of the two most challenging components to localize—the other being wind turbine control systems—China’s wind turbine bearing industry has achieved scaled and serialized production. This progress is marked by the development of key technologies, the successful completion of reliability tests, and the creation of proprietary innovations.

High-End Bearings: The Weak Link in Manufacturing

Despite rapid growth in China’s manufacturing sector, the development of high-end bearings for major equipment lags behind. Wind turbine bearings must withstand complex stress and vibration conditions while ensuring a service life of at least 20 years, presenting significant material and design challenges. Currently, domestic production primarily focuses on yaw and pitch bearings, while more technically demanding components like main shaft and gearbox bearings rely heavily on imports.

New Challenges for Bearings in Low-Wind-Speed Regions

China’s push for clean onshore wind power has expanded to the low-wind-speed regions of central and southern China. These areas, characterized by low average wind speeds and high turbulence intensity, pose unique challenges for wind turbine systems. Bearings must enable greater energy capture and handle random aerodynamic shocks. Developing bearings for low-wind-speed turbines requires targeted innovations, with no existing international precedent to follow.

Driving Green Development Through Innovation

Despite these challenges, domestic companies have made significant progress. Luoyang LYC Bearing Co., Ltd. was one of the first in China to develop wind turbine bearings. Its products have been operational for over 20 years, and the company has spearheaded the formulation of multiple national standards for wind turbine bearings. Its involvement in the "Key Technology Development and Large-Scale Application of Low-Wind-Speed Wind Turbine Systems" project earned a National Science and Technology Progress Award in 2018.

Academician Lu Bingheng of the Chinese Academy of Engineering emphasizes that high-end bearing development requires interdisciplinary research and fundamental studies. Comprehensive policies and technological planning are essential to overcome bottlenecks and support the advancement of high-end equipment manufacturing.