Identification of Unbalance in Rotating Machinery Using Vibration Analyse Solution

Abstract

Vibrations in rotating machinery are normally the consequence of mechanical faults such as mass unbalance, manufacturing, mechanical looseness, assembly, installed machines, coupling misalignment, and many other causes. However, unbalance is the most popular reason of machine vibration. An unbalanced rotor always causes more vibration and generates excessive force in the bearing area and reduces the life of the machine. In this paper, experimental studies were performed on a rotor with two mounted disks to identify the unbalance in rotor using order tracking technique based on one key phasor. After calculation of the coefficients of influence α of each experimental test, the matrix of influence coefficient [C] and the global matrix of coefficients [H] can be obtained. Finally, the two suitable masses are identified in order to reduce the unbalance of the rotor systems.