Calculating Input Torque for Gearbox and Pump

In summary, the required input torque to the gearbox and pump can be calculated by multiplying the output torque by 20, due to the 1:20 gearbox ratio. This is assuming that there are no losses in the process and that power is equal to torque multiplied by angular velocity. It is important to convert the given values of rpm to rads/sec before calculating.
  • #1
karl8695
5
0
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?
 
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  • #2
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...
 

1. How is input torque calculated for a gearbox and pump?

The input torque for a gearbox and pump is calculated by multiplying the force applied to the input shaft by the distance from the center of the shaft to the point of force application. This can also be expressed as the product of the input force and the input radius.

2. What units are used to measure input torque?

Input torque is typically measured in units of Newton-meters (Nm) or pound-feet (lb-ft). In some cases, kilogram-force meters (kgf-m) or pound-inches (lb-in) may also be used.

3. Are there any other factors that need to be considered when calculating input torque for a gearbox and pump?

Yes, in addition to the force and distance from the center of the input shaft, the gear ratio of the gearbox and the efficiency of the pump also need to be taken into account. The gear ratio affects the output torque, while the pump efficiency affects the amount of power required to rotate the input shaft.

4. How can input torque be increased for a gearbox and pump?

Input torque can be increased by increasing the input force or the input radius. Alternatively, using a gearbox with a higher gear ratio can also increase the output torque. However, it is important to ensure that the input torque does not exceed the maximum torque capacity of the gearbox and pump.

5. Can input torque be calculated using an equation?

Yes, the equation for calculating input torque is T = F x r, where T is the torque, F is the input force, and r is the input radius. This equation can be used as a guide, but it is important to also consider the gear ratio and pump efficiency for accurate calculations.

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