Bearings are used in the rotor spindle, gear box (speed up machine), generator, yaw gear box (reducer), yaw rotating seat, blade moment rotating seat, hydraulic pump and other parts of the fan. The yaw bearing is installed at the connecting part between the tower and the cockpit, and the variable rotor bearing is installed at the connecting part between the root of each blade and the hub. The variable rotor bearing and yaw bearing used in the variable rotor and yaw system are the super large rotary bearing.
The main shaft bearing of the rotor needs to be started, accelerated, decelerated and stopped irregularly repeatedly while undergoing variable load. Therefore, in addition to the research on the design of rotor spindle bearing, bearing type, bearing clearance, bearing roller number, convex processing, cage structure and other conditions, especially the minimum load, average load, maximum load of bearing parts, as well as the best technical conditions are particularly important.
The design should take into account the maximum load, the necessary strength of the axle box and the deformation of the axle box under the average load. It is necessary to study the bearing life, select the thin axle box design that meets no extra burden, and fully calculate the life of the spindle bearing in practice.
In addition, it is necessary to consider the deformation of the axle box and outer ring raceway surface, calculate the load of each rolling body, and calculate the life of the rotating ring and the fixed ring respectively.