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Real-time diagnosis method for angle misalignment fault of steam-electric generating set coupling

A turbogenerator set and diagnostic method technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of low reliability, long cycle, high economic cost of diagnosis, etc., and achieve the effect of reliable conclusion and scientific method

Inactive Publication Date: 2011-04-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0005] (2) Angle misalignment causes the bending direction on both sides of the coupling to be the same
[0007] Usually, the diagnosis of the misalignment of the unit coupling angle is done by experienced experts, which has the disadvantages of high economic cost, long cycle, low reliability and poor real-time performance.

Method used

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  • Real-time diagnosis method for angle misalignment fault of steam-electric generating set coupling
  • Real-time diagnosis method for angle misalignment fault of steam-electric generating set coupling
  • Real-time diagnosis method for angle misalignment fault of steam-electric generating set coupling

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Embodiment

[0032] This method can be used to correct the misalignment of the shaft coupling angle of the turbogenerator set. According to this method, a specific computer diagnostic program for the misalignment of the coupling angle 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 misalignment of shaft coupling angles includes data acquisition involved in the diagnostic method, verification of the same phase condition of shaft vibration, speed, frequency, and vibration, verification of abnormal amplitude of shaft vibration, speed, frequency, and vibration, and shaft coupling angle misalignment Fault judgment and other links.

[0033] First of all, the industrial computer (IPC) collects the shaft relative vibration signals on both sides of the coupling of the turbogenerator unit in real time through the high-speed data acquisition card, and the key phase signals required for vibrat...

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Abstract

The invention discloses a method for real time diagnosis of an angular misalignment fault of a large turbine generator set unit, belongs to the field of mechanical vibration condition monitoring and fault diagnosis and relates to real time online monitoring of vibration conditions of a large turbine generator set unit. By acquiring vibration signals of shafts at two sides of a coupler of a turbine set unit and further combining an FFT (fast Fourier transform) frequency spectrum analysis method, real time quantitative calculation and analyses such as shaft vibration speed-frequency vibration in-phrase condition verification and abnormal shaft vibration speed-frequency vibration amplitude verification of shaft vibration data are carried out. Based on the real time quantitative calculation and analyses and verification results, the method carries out real time online diagnosis of angular misalignment fault of the set unit automatically.

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 diagnosis method for the misalignment fault of a coupling angle 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 shafting misalignment problem of large turbogenerator sets is quite prominent, and a large number of vibration faults of turbogenerator sets are caused by or related to shafting misalignment. The turbogenerator set is a shafting system composed of multiple rotors, and the rotors are connected by couplings. The misalignment of the coupling angle means that the axes of two adjacent rotors are not on a continuous center line in the running state, and the axes of the two rotors intersect to form a certain angle, so that the load on the bearings on both sides cannot meet the design requirem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/00
Inventor 宋光雄
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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