- A Spur Gear C Transmits Power To A V Belt Pulley A Via A Shaft Abcd Rotating At 2000 Rev Min And Transfer Power With A M 1 (131.5 KiB) Viewed 11 times
A spur gear C transmits power to a V-belt pulley A via a shaft ABCD rotating at 2000 rev/min and transfer power with a moderate shock (take the lowest value). The shaft is supported by two bearings, i.e. one bearing at B and one bearing at D as shown in Figure Q1. The belt tensions are F1 = 450 N and F2 = 200 N. The gear forces are F3 = 1200 N, F4 = 700 N. The system will last until 25,000 hrs and both bearings has 98% reliability. = PO1 10 marks PO2 16marks i. Compute the total radial loads acting at bearing B and bearing D respectively. ii. If the total radial reaction forces at the bearing B is 950 N and at bearing D is 850 N, and bearing D is also designed to support the thrust load of F5 = 580 N, determine all the suitable sizes of the roller bearing and angular ball bearing for the shaft problem. iii. Design the suitable size of Bore, OD, w,r, ds, and dh for shaft and housing at bearing B and bearing D (refer Figure Q1). PO2 6 marks INPUT OUTPUT Belt Bearing Gear Ø150 Shaft Shieve 13 030 0250 022 Ge 450 F SY C Fs F2 45° F1 У 80 120 100 A B с D Figure Q1 All dimensions in mm.