Analysis and evaluation of rotor dynamic balancing on hard-bearing and soft-bearing

Abstract

The unbalance of rotating parts, also called rotor, is one of the main
causes of vibration in machines. Vibration not only reduces longevity of
machine, but also affects the operation of nearby machines. Thus, rotor
unbalance must be investigated and taken care of when it manifests. Rotor
unbalance is defined as unequal distribution of the weight of rotor through
ít’s rotating centerline. There are many causes of rotor unbalance, such as
manufacturing or assembly errors, deformation or wear during the
operation. Based on the motion of rotors during balancing process, the
balancing machines can be grouped in two general categories: static
balancing machine and dynamic balancing machine. In this paper we
focus on the analysis and evaluation of rotor balancing using dynamic
balancing machine with two types of bearing: hard-bearing and softbearing. The results demonstrated the properties of the hard-bearing and
soft-bearing used on the dynamic balancing machine.