Calculating Mass Moment of Inertia in a Two Stage Planetary Gearbox

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Discussion Overview

The discussion revolves around calculating the mass moment of inertia at the output shaft with respect to the input shaft in a two-stage planetary gearbox. Participants explore the necessary information and methods for performing this calculation, touching on theoretical and practical aspects.

Discussion Character

  • Technical explanation, Homework-related

Main Points Raised

  • One participant requests help calculating the mass moment of inertia, providing specific parameters of the gearbox, including torque and gear ratios.
  • Another participant notes that the calculation of mass moment of inertia depends on the physical geometry of the gears and suggests that the provided information is insufficient.
  • A different participant asks for an explanation of the method or formula for finding the mass moment of inertia.
  • One reply mentions that these calculations are typically covered in dynamics courses and questions the necessity of knowing the mass moment of inertia in this context.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the sufficiency of the provided information for calculating the mass moment of inertia, and there are differing views on the necessity of this calculation.

Contextual Notes

The discussion highlights potential limitations in the information provided, particularly regarding the physical geometry of the gears, which is crucial for the calculation.

pachai34
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hi everyone,
help me, To calculate the mass moment of inertia at output shaft with respect to input shaft in the two stage planetary gearbox.

Torque at input = 15 Nm
input speed = 1440rpm
stage I
zs=14
zp=23
zR=61 fixed
stage II
zs=21
zp=40
zR=102 fixed
 
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The mass moment of inertia, as I understand it, depends on things like the actual physical geometry of the gears. The information you have given is insufficient for such a calculation.
 
can explain the method or formula for finding the mass moment of interia?
 

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