Development of an Analytical Method for Dynamic Balancing of Rotors

Unbalance in rotating machinery is a common source of vibration in many applications and has a strong impact on the performance, accuracy of product and life of the rotating system. Generally, the dynamic balancing of rotors are carried out with the help of FFT Analyzer with expensive balancing software. Most of the commercially available balancing programs are not flexible, requires input like exact location o f the trial mass with respect to reference mark and do notallow intervention in between balancing procedure and in case of any mistake, the entire procedure need to be repeated. There are other methods for dynamic balancing like graphical method and trial and error method is cumbersome and prone to errors. This paper gives details on the development of an analytical method for dynamic balancing, which can be used with normal FFT Analyzer (with amplitude and Phase information). This method is inexpensive, easy to use, flexible and requires less time. This method provides correction mass and its angle with respect to the trial mass position. The developed analytical method has been validated by graphical method, experimental data and practical cases.