METHOD AND DEVICE FOR REMOVING HIGH FREQUENCY ELECTROMAGNETIC VIBRATION COMPONENT OF VIBRATION DATA OF ROLLING BEARING SECTION AND METHOD AND DEVICE FOR DIAGNOSING ROLLING BEARING OF ROTARY MACHINE

摘要

PROBLEM TO BE SOLVED: To identify and reduce frequency components of high frequency electromagnetic vibration based on electrical signals output from a vibration sensor, and to diagnose a rolling bearing of a rotary machine using the data.SOLUTION: Among peak values of high frequency bands of detected vibration acceleration, levels of the peak values whose frequency interval between each peak is an integral multiple of a reference frequency interval are reduced, and higher harmonic wave vibration components that are generated in an inverter driving motor regardless of a rotational frequency of a rotary machine are removed.