Evaluate power transmitted by belt.
Sol: Let T1 = Tension in tight side of the belt
T2 = Tension in slack side of the belt
V = Velocity of belt in m/sec.
= Π DN/60 m/sec, D is in meter and N is in RPM P = Maximum power transmitted by belt drive
The effective tension or force acting at circumference of driven pulley is difference between the two tensions (that is T1 - T2)
Effective driving force = (T1-T2)
Work done per second = Force X Velocity = F X V N.m
= (T1-T2)X V N.m Power Transmitted = (T1-T2).V/1000 Kw
(Here T1 and T2 are in Newton and V is in m/sec)
Note:
1. Torque exerted on driving pulley = (T1-T2).R1
Where R1 = radius of driving pulley
2. Torque exerted on driven pulley = (T1-T2).R2
Where R2 = radius of driven pulley