The main shaft bearing of a wind turbine is the main component that absorbs wind load and transmits load. Its performance not only affects the transmission efficiency, but also determines the maintenance cost of the main drive chain. Due to the harsh working conditions and long-life and high-reliability requirements of wind turbines, main shaft bearings have high technical complexity, which is recognized as one of the most difficult technologies, and has become an important factor affecting the development of wind power manufacturing.
The key points of the technical design of the main shafte bearings include the structural design of the bearing and the modification of the roller raceway. In order to obtain a reasonable structure design and modification plan, the load input should be processed accurately.
The bearing structure of the main shaft bearing mainly includes: double-row spherical roller bearings, toroidal roller bearings, cylindrical roller bearings, double-row tapered roller bearings, etc. Main shaft bearings also have high requirements for material, lubrication, sealing, coating, cage and other aspects.
The main shaft bearing configuration plan should be selected according to the structural design, operating conditions, operating environment, and cost control of the complete machine. Each bearing configuration plan should be comprehensively evaluated, and the design, manufacturing, installation, operation and maintenance of the bearing should be fully considered. Especially in the early design, it is necessary to fully consider the impact of the flexibility of the system on the life of the main shaft bearing.
LYXQL Slewing Bearing Co., Ltd. founded in 2003, is the leader manufacturer of large size slewing bearings in China. As one of the national key high-tech enterprises, LYXQL became the GEM listing company successfully on July 13, 2020 (stock code 300850).