Як розрахувати Gear Ratio
Що таке Gear Ratio?
Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.
Формула
Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
Покрокова інструкція
- 1Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
- 2Spur gears: ratio = number of teeth on driven / number on driver
- 3Power is conserved: P = T × ω
Розв'язані приклади
Введення
Input 1800 rpm, output 600 rpm
Результат
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
Поширені помилки
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
Часті запитання
Can any two gears mesh together?
No, they must have same pressure angle and pitch. Teeth must fit smoothly without interference.
How is efficiency handled?
Mechanical power loss (5-10%) converts to heat; P_out = P_in × η.
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