Method for judging low-frequency vibrating failure of compressor quickly

The invention discloses a method for judging the low-frequency vibrating failure of a compressor quickly, which comprises the following steps of: analyzing historical data of the compressor to obtain a performance curve of a machine set; collecting to acquire a vibrating signal of the machine set, and judging whether the machine set is in a stable working condition area or not by combining running parameters of the machine set; if the machine set is in the stable working condition, making a frequency spectrum and a two-dimensional holospectrum, and identifying the current failure of the machine set according to different expression characteristics of oil whirl and airflow excited vibration on the two-dimensional holospectrum; and if the machine set is in an unstable working condition area, regulating and changing the running parameters of the machine set, and judging the failure of the machine set according to the characteristics that the frequency spectrum and the two-dimensional holospectrum are changed bef