Method for automatically acquiring rotating speed of rotating equipment in abnormal state

Abstract

The invention relates to the technical field of fault diagnosis of rotating mechanical equipment, and discloses a method for automatically acquiring the rotating speed of rotating equipment in an abnormal state, which comprises the following steps of: preprocessing an acceleration signal, performing fast Fourier transform to obtain a frequency spectrum, and obtaining a plurality of alternative one-time frequency multiplication by using a peak point of the frequency spectrum; and then the alternative first frequency multiplication is utilized to solve the corresponding second frequency multiplication to the tenth frequency multiplication, the real first frequency multiplication is judged according to the sum of the amplitudes of the ten frequency multiplication components, and finally the rotating speed of the rotating equipment is calculated according to a formula. According to the method, the rotating speed value can be automatically obtained, dependence on experience of professional engineers is avoided, and the calculation mode is more convenient and accurate.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis of rotating mechanical equipment, and in particular relates to a method for automatically obtaining the rotational speed of rotating equipment in an abnormal state. Background technique [0002] As an important mechanical equipment in modern industry, rotating machinery is widely used in industrial production. Once the rotating equipment fails, it will cause huge economic losses. Under the background of big data and artificial intelligence, predictive operation and maintenance of rotating equipment is the key direction of the development of major enterprises. In the field of predictive operation and maintenance, it is often necessary to accurately obtain the rotational speed of rotating equipment under abnormal conditions. Used to determine the type of equipment failure. [0003] At this stage, there are mainly two methods for obtaining the rotational speed. One is to directly collect s...

AI Technical Summary

Problems solved by technology

One is to directly collect speed data by adding speed sensors, eddy current sensors, and photoelectric speed sensors. However, this method is difficult to apply on a large scale due to the limitations of cost factors, construction difficulty, and difficulty in measuring speed in wireless systems.

The second is to collect vibration signals by installing vibration sensors, and then the engineer determines the speed of the equipment by analyzing the frequency spectrum corresponding to the vibration signal. In this method, the accuracy of speed recognition depends on the experience of the engineer, which is highly subjective. In addition, engineers also need to observe and compare a large number of captured vibration signals, which is a heavy workload and prone to errors

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