What is Vibration Analysis? Why Vibration Analysis is necessary before Dynamic Balancing?
“Vibration Analysis” is a process of measuring the frequencies and vibration levels of machine to pinpoint the main cause of vibration in machine by analyzing the whole data collected.
Vibration Analysis is necessary before dynamic balancing because in a Rotary Machine vibration is the first indication of defect and it may be due to one or more than one causes at a time. Therefore, vibration analysis is very necessary to pinpoint cause of fault.
Following fifteen causes of vibrations are found very common in the Rotary Machines:
1. Imbalance of Rotor
2. Bent Rotor Shaft
3. Eccentric Rotor Shaft
4. Twisted Rotor Shaft
5. Mechanical Looseness Read More
WHY YOU NEED DYNAMIC BALANCING FOR ROTORS?
It has come in the experience that in 80% cases of vibrations of Rotary Machines, major cause of vibration found is Unbalance. Unbalance Force is actually a Centrifugal force and a man can experience this Unbalance Force by rotating a stone tide with string, around his body.
In rotary machines this outward flying Centrifugal Force of Unbalance increases at the rate of “Square of Rotor Speed”. This force put a tremendous Crushing Pressure on the balls of bearings.
This force becomes a HAMMER OF UNBALANCE and keeps on hitting the balls of bearings continuously, during each rotation, against sliding race of Roller Bearings or hydraulic oil film supporting the shaft in Journal / Sleeve Bearings.
Unbalance of only 100g-m become a HAMMER OF UNBALANCE of weight equal to Read More