Key supporting bearings for wind turbines, including:
Yaw system bearing
Pitch system bearing
Spindle bearing
Other system bearings (generator bearings and gear bearings)
Yaw system bearing: The yaw mechanism installed in the wind turbine cabin base assembly is used to accurately adjust the windward angle of the wind turbine and conduct lightning to the ground, carrying the full weight of the main drive system of the wind turbine (radial load axial direction) Load and overturning moment). It requires good sealing performance, high reliability, flexible operation and smoothness, and surface anti-corrosion life of more than 20 years. This type of bearing generally uses extra large four-point contact or crossed cylindrical roller slewing bearings.
Pitch system bearing: A sub-slurry system assembly located in the blade for adjusting the windward direction of the blade, mainly bearing radial load, axial load and overturning moment. The bearing is required to have good sealing performance, high reliability, surface anti-corrosion, flexible operation, and a service life of more than 20 years. Class bearings generally use four-turn contact or double volleyball extra large slewing bearings.
Spindle bearing: Located on the main shaft of the blade, the working load is high and it is required to compensate the deformation of the main shaft. Therefore, the bearing should have good centering performance, high load capacity, and long service life. Spherical roller bearings with optimized design are generally used.
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