14.50 In the train drive shown in Sketch b, gear 2 is the inlet of the gear train and transfers 3.0 kW of power at 2000 rpm. Each gear contact reduces the speed ratio by 5:3.
(a) Find the number of teeth for gears 3 and 4. Ans N3 = 50, N4 = 120.
(b) Determine the rotational speed of each gear. Ans w3 = w4 = 1200 rpm, w5 = 720 rpm.
(c) Calculate the torque of each shaft, when because of frictional losses there is a 5% power loss in each matching pair. Ans. Tin = 14.32 N-m, Tout = 35.90 N-m.
Chapter 14 30 T
General Gear Theory; Spur Gears
200 T
In
2
5
3
Sketch b, for Problem 14.50