Influence of basic motion on dynamic balance accuracy

Abstract

Due to the complex environment of rotating machinery, rotating machinery is inevitably affected by environmental excitation. The basic motion excitation in environmental excitation will affect the dynamic response of the rotor. In order to study the impact of basic motion on the judgment of the rotor imbalance, the establishment of rotor motion is adopted. Differential equations and finite element simulation methods for dynamic equilibrium experiments. The results show that when the frequency of the basic motion excitation is the same as the unbalanced excitation in the system, the basic motion excitation will affect the amplitude and phase of the power frequency, and then affect the judgment of the rotor imbalance amount, resulting in a certain balance error and impact. Dynamic balance effect, but unlike unbalanced excitation, the direction of the force generated by the basic excitation will not change, so when the vertical amplitude and phase of the generated force of the excitation is used as a reference, the impact caused by the basic motion can be avoided.