Research on Rotor Axis Orbit Measurement of High Speed Precision Spindle Under Unbalance Fault

Abstract

Rotor axis orbit measurement can reflect a lot of running characteristics of the rotor, however, it’s hard to acquire the rotor axis orbit accurately for precision spindle, in particular the rotor of the high speed spindle is working under fault conditions. The most common fault of the high speed spindle is unbalance fault, which is must exist with the rotating machinery, also the unbalanced fault has a direct influence on the working precision of spindle. At the same time, the rotor axis orbit measurement result has often been influenced by the surface roundness error of the measurement object. In order to solve this problem, the error separation method is using for extracting the accurately rotor axis orbit, also the surface roundness error of the measurement object has been acquired. Compared with the rotor axis orbit measurement result under unbalance fault and balance state, though the measurement experiment, the rotor axis orbit measurement results are different and the surface roundness error separation results are almost the same. The experiment result prove that the unbalance fault could influence the result of the rotor axis orbit, but the surface roundness will not be influenced by the unbalance fault and it’s intrinsic attributes of the measurement object, in addition that the results verify the accuracy of the error separation algorithm.