Real-time recognition method for vibration opposite-phase vector stability of turbogenerator unit rotor

Abstract

The invention discloses a real-time recognition method for the vibration opposite-phase vector stability of a turbogenerator unit rotor, belonging to the fields of mechanical vibration state monitoring and fault diagnosis. A vibration signal, a rotating speed signal and a bonded phase signal of a turbogenerator unit rotor shaft are collected to calculate and analyze vibration data in real time. The method comprises the following steps of: calculating and storing the real parts and the imaginary parts of opposite vibration opposite-phase vectors of two side shafts of the rotor in real time; calculating in real time by combining with statistic values, such as the mean value of the real parts and the imaginary parts of the opposite-phase vectors, a standard deviation, and the like; ordering the mean value sequence of the real parts and the imaginary parts of the opposite-phase vectors and a standard deviation sequence and calculating inversion numbers thereof; and calculating the steady-state parameters of the real parts and the imaginary parts of the opposite-phase vectors. On a basis of real-time quantitative calculation and analysis, various vibration results are combined to carry out the automatic real-time online judgment on whether the vibration opposite-phase vectors of a unit shafting rotor have stability. The invention has the advantages of scientific method, conclusion reliability and the like and can realize automatic real-time online monitoring, analysis, and the like.

Description

technical field [0001] The invention belongs to the field of vibration state monitoring and fault diagnosis of rotating machinery, and in particular relates to a real-time identification method for the steady-state property of the rotor vibration antiphase vector of a large turbogenerator set for real-time on-line automatic monitoring of the vibration state of a large turbogenerator set. Background technique [0002] The vibration state of a steam turbine generator set is an important index for the safe operation of the set. Vibration stability during unit operation is one of the most important issues related to the safe and reliable operation of the unit. If the monitoring and analysis of the vibration state is not timely, it may lead to partial or overall serious failure of the unit. Due to the deterioration of the vibration of the unit, load reduction operation, or shutdown treatment, or emergency forced shutdown often occurs. [0003] The turbo-generator set operates a...

AI Technical Summary

Problems solved by technology

[0004] The existing identification of the stability of the shafting and rotor vibration of the turbogenerator needs to be completed by experts with certain experience in field vibration fault diagnosis, which is poor in objectivity, highly dependent on the subjectivity of experts, and cannot be done. Real-time automatic on-line monitoring, analysis and discrimination of the steady state of the anti-phase vector to vibration

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