Torque calculations

  • Thread starter karl8695
  • Start date
  • #1
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Main Question or Discussion Point

Hi all,

I have a the following problem to solve fairly quickly, I need to calculate the required input torque to my gearbox and pump

Gearbox output torque - 0.12348Nm
Gearbox output speed - 80 rpm
Gearbox input speed - 4 rpm

Gearbox (compound gears) Gear A, driver = 100 teeth, Gear B, driven = 20 teeth, Gear C, driver = 80 teeth and Gear D, driven = 20 teeth

Gearbox Ratio 1:20

What is the input torque?
 

Answers and Replies

  • #2
549
28
20 times the output torque
 
  • #3
Power is not stored in the gear train. We assume that the process is reversible with no losses. since power=torque*omega(angular velocity) set the two equal to each other and solve. Don't forget to convert rpms to rads/sec.
 
  • #4
edit, energy is not stored in the drivetrain...............
 

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