The yaw bearing of a wind turbine is installed at the connection between the tower and the nacelle, while the pitch bearings are installed at the connection between the root of each blade and the hub. Each wind turbine uses one yaw bearing and three pitch bearings. The bearing rings of both the yaw and pitch bearings are made of 42CrMo steel. The heat treatment involves overall quenching and tempering, with the raceway surface undergoing surface hardening. The stress state of the yaw and pitch bearings is complex, and they are subjected to significant impact and vibration. Therefore, the bearings need to withstand impact and heavy loads. The service life requirement for the wind turbine main unit is 20 years, and the bearing installation cost is high; therefore, the service life of the yaw and pitch bearings is also required to be 20 years. The base hardness of the bearing rings is 240-280 HB, which allows them to withstand impact without plastic deformation. At the same time, the surface hardness of the raceway reaches 55-62 HRC, which improves contact fatigue life and ensures the required bearing lifespan.
Wind turbine slewing bearings are large bearings primarily used in pitch and yaw systems. They are subjected to complex loads, and their disassembly and maintenance are extremely difficult. Therefore, the design and manufacturing requirements for wind turbine slewing bearings are very stringent. Slewing bearings are core components of wind turbines and are widely used in their pitch and yaw systems. Pitch bearings connect the hub and blades, while yaw bearings connect the tower and the nacelle. Due to their large size and complex installation location, maintaining wind turbine slewing bearings is very challenging. Furthermore, a failure of the slewing bearing directly impacts the performance of the wind turbine and can even lead to downtime. Therefore, wind turbine slewing bearings need to possess high reliability and a long service life, at least matching the 20-year lifespan of the wind turbine itself.
Luoyang Hengchang Heavy Machinery Co., Ltd. is an entity manufacturer of slewing bearings and customized non-standard machining parts. Our company integrates professional design, research and development, manufacturing, sales and service. Relying on the strong manufacturing capacity and research and development capacity, we can provide customers with one-to-one customized services and solutions.
If you have any inqury or questions for our products, please feel to contact us.
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