Experimental validation of impact energy model for the rub-impact assessment in a rotor system

摘要

An experimental setup which can simulate the rotor-to-stator rub in a rotor system is installed. A rub screw is used to simulate the condition of local rub-impact fault. Based on the theory of elastic collision and energy conservation, an Impact Energy Model (IEM) is proposed to evaluate the probability or severity of rub-impact fault. To prove this model, the paper conducts the experiment in two steps i.e. hammer test and rub-impact fault validation. The wave signal, spectrum and axis orbit are used to analyze the severity of the rub-impact fault when it occurs. The analysis result shows that the proposed Impact Energy Model {IEM) is effective in the assessment of rub-impact fault. Furthermore, the proposed IEM can also provide a reference for the design and operation of a rotor system.