Method for diagnosing periodic fluctuation vibration of steam turbine generator unit shafting

Abstract

The invention belongs to the technical field of equipment detection, and particularly relates to a steam turbine generator unit shafting periodic fluctuation vibration diagnosis method which comprisesthe following four steps: 1, performing vibration preliminary analysis according to operation and vibration measurement data; p 2, carrying out stress analysis on steam turbine generator unit shafting; 3, drawing a shafting bending strain schematic diagram; and 4, introducing Hooke's law to perform vibration analysis. For the vibration problem that the vibration amplitude fluctuates periodically,conditions actually encountered in engineering are relatively few, and periodic fluctuation vibration of a steam turbine generator unit with data records at present only relates to beat vibration andfriction vibration. However, if the periodic vibration law and characteristics of the steam turbine generator unit are not completely matched with friction vibration or beat vibration, the Hooke's law is applied to vibration analysis by using the diagnosis method, so that the defect reason can be accurately positioned, and the engineering practical problem is solved.

Description

technical field [0001] The invention belongs to the technical field of equipment detection, and in particular relates to a diagnosis method for periodic fluctuating vibration of a shaft system of a steam turbine generator set. Background technique [0002] The mega-kilowatt nuclear power steam turbine generator set designed and manufactured by Dongfang Steam Turbine Co., Ltd. often suffers from periodic fluctuating vibration faults. At present, the nuclear power generating units in operation of China National Nuclear Corporation, General Nuclear Power, and National Nuclear Corporation have periodic fluctuating vibrations in individual units. Fault. [0003] The main characteristics of fluctuating vibration of nuclear power steam turbine generator set are as follows: [0004] A. The fluctuation range of 6 watts is the largest, followed by 5 watts and 8 watts, and the fluctuations of 1-4 and 7 watts are not obvious. [0005] B. Fluctuating vibration is automatically generate...

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Problems solved by technology

[0010] National Vibration Research Center, Vibration Research Institute of Xi'an Thermal Engineering Research Institute, Xi'an Jiaotong University, China National Nuclear Corporation and other well-known domestic vibration experts have consulted many times, but the fluctuating vibration has not been solved well.

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