Common failure modes of planetary bearing: the selection and application of planetary bearing are related to the design of the spindle. Currently, the common planetary bearing is full complement cylindrical roller bearings.If the spindle bearing using spherical roller bearing, both single self-aligning bearing spindle bearing 3 points or two spherical roller bearing design 4 bearing design of spindle bearing, due to the spherical roller bearing the existence of the radial and axial clearance, when the fan in braking or other axial load, the working conditions of alternating direction behind the spindle and the connection of planet carrier in axial there may be a rash move.At this time if you use a cylindrical roller bearing bracket bearing as a planet, due to its outer ring has a certain relative displacement in the axial direction space, so from the main shaft axial channeling move will be passed to the planet carrier of cylindrical roller bearing, and if the momentum is large enough, it would impact of cylindrical roller bearing.In addition, because the inner gear ring is connected with the gearbox body, the axial movement of the planetary wheel together with the planetary frame will also cause tooth surface wear on the planetary wheel.
Solution: FRB BEARINGS recommends using single row taper roller bearing straddling to solve the influence of spindle axial channeling on planetary wheels by pretightening the taper roller bearing.And preloaded tapered roller bearing load bearing area was optimized, reduced the raceway stress, improve the rigidity of planetary gear train, and can withstand external transfer into the additional axial force on planet gear box frame.
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