1.Introduction Slewing Bearing Of For Wind Power Generation
The slewing bearing for wind power generator is a kind of extra large bearing, which is mainly used for pitch and yaw system. It is complicated to load and difficult to disassemble and maintain. Therefore, the design and manufacturing requirements of wind power slewing bearing are strict. The slewing bearing is the core component of the wind turbine and is widely used in the pitch and yaw systems of wind turbines. The pitch bearings are used to connect the wheel and the blades, and the yaw bearings are used to connect the tower and the unit. Due to its large size and difficult installation and assembly, the wind power slewing bearing is very difficult to repair, and once the slewing bearing fails, it will directly affect the working performance of the wind turbine and even cause downtime. Therefore, the wind power slewing bearing is required to have high reliability and long service life, at least to reach the service life of the wind power generator, that is, 20 years.
2.The Selection Slewing Bearing Of For Wind Power Generation
The selected slewing bearing generally has a single row four point contact ball type, a double-row four point contact ball type, a cross roller type, a three row roller type, etc.
Wherein the single row four point contact ball type slewing bearing has a low cost, and The comprehensive performance is high.
The double row type slewing bearing has long service life, strong carrying capacity, small turning resistance, large wear amount, low requirements on the mounting base, but low motion precision.
High precision of three cross roller type slewing bearing.Long service life and high dynamic load capacity, but high requirements on the rigidity and precision of the pedestal, and the edge effect is easy to occur when the roller and the raceway are in contact, resulting in the edge actual stress being much larger than the design stress; three row roller type Slewing bearings generally have a very high static load carrying capacity.