Kuinka laskea Gear Ratio
Mikä on Gear Ratio?
Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.
Kaava
Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
Vaiheittainen opas
- 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
Ratkaistut esimerkit
Syöte
Input 1800 rpm, output 600 rpm
Tulos
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
Yleisiä virheitä vältettäväksi
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
Usein kysytyt kysymykset
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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