Second, the earth gear bearings have to play an active part in torque transfer. Planetary systems split the torque insight from sunlight gear amongst the earth gears, which 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 contact or tapered roller bearings, both which are created to withstand axial loads.
In planetary gearboxes, however, it’s a lot more difficult to design around these axial forces for just two related reasons. Initial, there is typically very little space in a planetary gearbox to include the kind of bulky bearings that may 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 additional 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 equipment shafts, but they do not play an active part in torque transfer.
Helical Gears Place Better Demand on Bearings
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