Second, the planet gear bearings have to play an active function in torque transfer. Planetary systems split the torque insight from the sun gear amongst the planet gears, which transfer torque to a planet carrier linked 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 contact or tapered roller bearings, both of which are made to withstand axial loads.
In planetary gearboxes, however, it’s a lot more difficult to create around these axial forces for two related reasons. Initial, there is typically hardly any area in a planetary gearbox to incorporate the kind 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 critical to make a distinction between fixed-axis and planetary gearboxes. In fixed-axis gearboxes, the excess axial forces total little more than a hassle. Gearbox designers will often upsize the bearings to accommodate the additional forces.
Since they won’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 equipment shafts, but they do not really play an active part in torque transfer.
Helical Gears Place Better Demand on Bearings
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