How to calculate the speed ratio of the gearbox

Gearboxes have become common in our daily lives, which is closely related to their excellent performance characteristics and product advantages; Do you know anything about the speed ratio of this device? Today, let me teach you the method of calculating the speed ratio of a gearbox:
When using a reducer, we usually refer to the ratio of the rated speed nN (r/min) of the motor to the output shaft speed nL of the reducer as the speed ratio I, also known as the transmission ratio. The formula is: i=nN/nL.
Calculation method for gear ratio of reducer:
Assuming the rated power of the motor is P (kw), the speed is n1 (r/min), the total transmission ratio of the reducer is i, and the transmission efficiency is u.
Then: Output torque=9550 * P * u * i/n1 (N.m)
1. The definition and calculation method of a reducer: Reduction ratio=Input speed ÷ Output speed.
2. The general calculation method for equipment: Reduction ratio=Used torque ÷ 9550 ÷ Motor power Motor power Input speed ÷ Usage coefficient.
3. Calculation method for gear system: Reduction ratio=number of teeth on the driven gear ÷ number of teeth on the driving gear (if it is a multi-stage gear reducer for reduction, then the number of teeth on the driven gear ÷ number of teeth on the driving gear of all meshing gear sets can be multiplied by the obtained result)
4. Calculation method for reduction ratio of gearbox belt, chain and friction wheel: Reduction ratio=driven wheel diameter ÷ driving wheel diameter.
The above are some calculation methods for the speed ratio of reducers that the editor has compiled for you. I hope it can help you with speed ratio calculations in the future!