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planetary-gearboxes

Planetary Gearboxes consists of three major components:

  • Sun gear
  • Planet gear
  • Ring gear

The sun gear is meshed around with the planet gears, which in turn are meshed with ring gear. Planet gears are connected to each other by a carrier, which helps them to rotate around the sun gear


Advantages of Planetary system over helical gearbox:

  • They are compact and take less space and are light weight, as the load is shared between the planet gears.
  • The noise and vibration is reduced as the load is shared. This also increases efficiency
  • Since the shafts are inline and concentric, bending moment is absent.
  • The manufacturing of these components is relatively cheaper due to smaller size as compared to parallel axis gearboxes.

Disadvantages:

  • The gear system is complex and needs precision manufacturing
  • Teeth ratios are specific and assemble is according to them.
  • Calculations of efficiency are a bit difficult.

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