Second, the earth gear bearings need to play an active role in torque transfer. Planetary systems split the torque input from sunlight gear amongst the earth gears, which in turn transfer torque to a planet carrier connected to the gearbox result. The bearings that support the planets on the carrier have to bear the full brunt of this torque transfer.
Or, in acute cases, they may select angular get in touch with or tapered roller bearings, both which are designed to withstand axial loads.
In planetary gearboxes, however, it’s a lot more difficult to create around these axial forces for two related Helical Gearbox reasons. Initial, there is typically hardly any room in a planetary gearbox to incorporate the type of bulky bearings that can tolerate high axial forces.
The presence of axial forces makes things completely different for the bearings that support helical gears. But it is important to make a distinction between fixed-axis and planetary gearboxes. In fixed-axis gearboxes, the excess axial forces total little more than an inconvenience. Gearbox designers will often upsize the bearings to support the additional forces.
Since they don’t need to withstand any axial forces, spur gear bearings perform just a supporting part in the functioning of the gearbox. The bearings should just support the rotating gear shafts, however they do not play an active role in torque transfer.
Helical Gears Place Better Demand on Bearings