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On-line real-time diagnosis method for parallel misalignment fault of coupling

A diagnostic method and coupling technology, which are applied in the field of rotating machinery vibration state monitoring and fault diagnosis, can solve the problems of long cycle, low reliability, and high diagnostic economic cost, and achieve the effect of scientific method and reliable conclusion.

Inactive Publication Date: 2009-05-13
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Usually, the diagnosis of the parallel misalignment fault of the unit coupling is completed by experienced experts, which has the disadvantages of high economic cost of diagnosis, long cycle, low reliability and poor real-time performance

Method used

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  • On-line real-time diagnosis method for parallel misalignment fault of coupling
  • On-line real-time diagnosis method for parallel misalignment fault of coupling
  • On-line real-time diagnosis method for parallel misalignment fault of coupling

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Embodiment

[0025] Using this method can realize the parallel misalignment fault of the shaft coupling of the turbogenerator set. According to this method, a specific computer diagnosis program for the parallel misalignment fault of the coupling is designed, and the fault diagnosis program is installed in the industrial computer (IPC). A diagnostic cycle process in the real-time diagnosis program for parallel misalignment faults of couplings includes data acquisition involved in the diagnostic method, verification of abnormal temperature of bearing seat tile temperature, verification of shaft vibration speed, frequency, vibration phase conditions, and judgment of parallel misalignment faults of couplings And so on.

[0026] First, the industrial computer (IPC) collects the shaft-relative vibration signal of the turbogenerator set in real time through the high-speed data acquisition card, the key phase signal required for vibration signal analysis and processing, and the temperature of the...

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Abstract

The invention discloses a real-time online diagnosis method of a coupling parallel misalignment fault, belongs to the fields of mechanical vibration state monitoring and fault diagnosis, and relates to the real-time online monitoring of the vibration state of the large steam turbine generator set. The method comprises the following steps: acquiring vibration signals of shafts on two sides of a coupling of the steam turbine generator set and temperature data of bearing bushes of bearing pedestals on two sides of the coupling; judging in real time whether the temperature of the bearing bushes of the bearing pedestals on the two sides of the coupling of the set is abnormal, and combining the Fast Fourier Transform (FFT) spectrum analysis method to perform shaft speed frequency vibration phase condition verification on the relative vibration data of the shafts on the two sides of the coupling; and automatically diagnosing in real time whether the coupling parallel misalignment fault occurs in the set based on real-time quantitative computation and analysis and in conjunction with various verification results in an online manner. The method has the advantages of scientificness, reliable conclusion, automatic realization of the real-time online monitoring and the fault diagnosis and the like.

Description

technical field [0001] The invention belongs to the field of vibration state monitoring and fault diagnosis of rotating machinery, in particular to an online real-time diagnosis method for shaft coupling parallel misalignment faults for real-time on-line automatic monitoring of the vibration state of a large steam turbine generator set. Background technique [0002] A large number of rotating machinery vibration faults are caused by or related to shafting misalignment, and the parallel misalignment fault of shaft coupling is one of the common vibration faults of large turbogenerator sets. The misalignment problem of the shafting system of large-scale domestic units is quite prominent, and the misalignment fault is listed as the primary factor in the diagnosis and treatment of the vibration fault of the shafting system of the steam turbine generator set. [0003] The turbogenerator set is a shafting system composed of multiple rotors, and the rotors are connected by couplings...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G01B17/00
Inventor 宋光雄
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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