Second, the earth gear bearings need to play an active part in torque transfer. Planetary systems split the torque insight from the sun gear amongst the earth gears, which transfer torque to a world 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 could select angular contact or tapered roller bearings, both which are created to withstand axial loads.
In planetary gearboxes, however, it's a lot more difficult to create around these axial Helical Gearbox forces for two related reasons. First, there is typically hardly any area in a planetary gearbox to incorporate the type of bulky bearings that may tolerate high axial forces.
The existence of axial forces makes things very 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 most likely upsize the bearings to support the additional forces.
Since they don't need to withstand any axial forces, spur gear bearings enjoy just a supporting role in the functioning of the gearbox. The bearings should just support the rotating gear shafts, but they do not really play an active role in torque transfer.
Helical Gears Place Higher Demand on Bearings
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