A Method for Distinguishing Vibration Frequency of Rotary Machinery

Abstract

The invention relates to a rotary machine vibration frequency discrimination method, which comprises the following steps: vibration speed and displacement are successively measured at a same measuring point of a rotary machine by the utilization of a portable vibrometer, and actual rotary speed xi of the rotary machine equipment is measured; according to S=27020*V measurement / D measurement, the value of speed equivalent S is calculated; by the utilization of eta=S / xi, the value of eta is calculated; according to the value of eta, whether vibration frequency of the rotary machine is low frequency, high frequency or rotational frequency is discriminated; and according to the discrimination result of the vibration frequency, the reason of the vibration fault and the fault position can be traced rapidly and accurately. By the method, it brings great convenience for working condition and repair work of the rotary machine; repair work efficiency of workers is greatly raised; shutdown and work delay frequency and time of the machine set are minimized; and continuity and stability of the whole production are guaranteed.

Description

technical field

[0001] The invention relates to a method for distinguishing the vibration frequency of a rotating machine. Background technique

[0002] At present, when a vibration fault occurs in a rotating machine, it is necessary to analyze the cause of the fault, and the analysis of the vibration frequency is very important.

[0003] In the field of rotating machinery vibration, the definition of vibration frequency is: the vibration frequency is higher than the frequency corresponding to the rotational speed, which is called high-frequency vibration. The frequency corresponding to the vibration frequency lower than the rotational speed is called low frequency vibration. The frequency corresponding to the vibration frequency equal to the rotational speed is called the fundamental frequency vibration. Because the vibration mechanisms of these three frequencies are different, judging which frequency vibration belongs to is extremely critical for accurate fault judgment....