2.1 planet carrier bearing
2.1.1 Common Failure Modes The selection and application of planet carrier bearings is related to the design of the spindle. The currently common planetary carrier bearings are cylindrical roller bearings with full complement rollers. If the spindle bearing uses a spherical roller bearing, whether it is a 3-point bearing design of a single spherical roller spindle bearing or a 4-point bearing design of two spherical roller spindle bearings, due to the radial and axial direction of the spherical roller bearing The presence of the play (as shown in Figure 1), when the wind turbine is in the braking or other conditions where the axial load alternates direction, the main shaft and the planet carrier connected behind it may be tilted in the axial direction. At this time, if a cylindrical roller bearing is used as the carrier bearing, since the inner and outer rings have a certain relative misalignment space in the axial direction, the axial sway from the main shaft is transmitted to the cylindrical roller bearing of the carrier, and if If the amount of turbulence is large enough, it will cause an impact on the cylindrical roller bearing. Moreover, since the ring gear and the gearbox housing are integrated, the axial rotation of the planet gear and the planet carrier also causes tooth surface wear on the planet gears.
2.1.2 Solution Timken recommends the use of a single row of cnwpem
Tapered roller bearings are straddle mounted and pre-tightened by tapered roller bearings
The effect of the axial rotation of the main shaft on the planetary gear. And pre-tightened tapered roller
The bearing area of the sub-bearing is optimized to reduce the raceway stress and improve
The rigidity of the planetary gear train and the additional axial force that can be transmitted to the outer end of the outer gearbox
