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Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.
Công thức
Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input
Hướng dẫn từng bước
- 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
Ví dụ có lời giải
đầu vào
Input 1800 rpm, output 600 rpm
Kết quả
Gear ratio = 3:1 (3× speed reduction, 3× torque increase)
Power unchanged
Lỗi thường gặp cần tránh
- ✕Confusing speed ratio with force multiplication
- ✕Neglecting friction losses in extended calculations
Câu hỏi thường gặp
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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