Gear Ratio کا حساب کیسے لگائیں
Gear Ratio کیا ہے؟
Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.
فارمولا
Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
مرحلہ وار گائیڈ
- 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
حل شدہ مثالیں
ان پٹ
Input 1800 rpm, output 600 rpm
نتیجہ
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
عام غلطیاں جن سے بچنا ہے
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
اکثر پوچھے جانے والے سوالات
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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