Rotation machinery torsional vibration signal collection analysis method

Abstract

The invention discloses a rotation machinery torsional vibration signal collection analysis method, comprising steps of installing a marking device at a rotation shaft measurement cross section of a device to be tested, installing a matching detection device, removing low frequency interference in an outputted pulse signal, converting the pulse signal to a standard TTL pulse signal, utilizing a high frequency counter to perform signal collection to obtain a series counting value, using an obtained series counting value to solve a series transient angular speed value, solving the series uniform angle collection transient torsional angle speed value, solving a series equal-time-interval sampling transient torsional angle speed value, solving the real torsional angle speed signal, performing integral transformation on a real torsional angle speed signal after the trend item is eliminated to obtain a torsional vibration angular displacement signal. The invention maximally improves the accuracy and reliability of rotation machinery torsional vibration signal analysis and has high reliability and high measurement accuracy.

Description

technical field [0001] The invention relates to a method for collecting and analyzing torsional vibration signals of rotating machines, in particular to a method for collecting and analyzing torsional vibration signals of rotating machines suitable for various types of rotating machines such as steam turbines, gas turbines, generators, compressors, fans, pumps and engines. Background technique [0002] Torsional vibration is a type of vibration fault that often occurs in rotating machinery such as steam turbines, generators, and fans. Under the action of large-scale torsional vibration shock or long-term torsional vibration, "twist-like" cracks at an angle of 45° to the cross-section will appear on the surface of the shaft, which may easily cause fatigue damage to the shaft. Different from the bending vibration test of the rotating shaft, the torsional vibration test is more complicated, and the test results are affected by many factors, and the test technology is far less m...

AI Technical Summary

Problems solved by technology

Under the action of large-scale torsional vibration shock or long-term torsional vibration, "twist-like" cracks at an angle of 45° to the cross-section will appear on the surface of the shaft, which may easily cause fatigue damage to the shaft

Different from the bending vibration test of the rotating shaft, the torsional vibration test is more complicated, and the test results are affected by many factors, and the test technology is far less mature than the bending vibration test technology

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