WHAT IS THE SIMPLE EQUATION FOR CALCULATING , HOW MUCH TENSION NEEDED FOR AN INDUSTRIAL FAN BELT(V BELT) WHICH IS DRIVEN BY MOTOR.WE HAVE THE DIAMETERS OF PULLEYS , RPM ,POWER (KW) OF MOTOR , SPAN LENGTH OF MOTOR. KINDLY GIVE ME THE TIPS...
The breaking strength of the belt would be the tension but then you have to consider types of belts, starting and running (continuous, intermittent)loads, environmental factors such as temperature. A quick check would be to press at the center(that is between sheaves) point of the belt to determine if the "play" is not excessive. Manufacturers' technical literature will state the applicable limits of such "play".