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

A technology for turbogenerator sets and diagnostic methods, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve problems such as fluctuations and vibrations that cannot be solved well, achieve accurate location of defect causes, and solve engineering practice problem effect

Active Publication Date: 2020-04-14
CNNC FUJIAN FUQING NUCLEAR POWER
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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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  • Method for diagnosing periodic fluctuation vibration of steam turbine generator unit shafting
  • Method for diagnosing periodic fluctuation vibration of steam turbine generator unit shafting
  • Method for diagnosing periodic fluctuation vibration of steam turbine generator unit shafting

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Embodiment Construction

[0059] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Such as Figure 1-2 A method for diagnosing the periodic fluctuating vibration of the shafting of a turbogenerator set includes the following steps:

[0060] Step 1: Preliminary vibration analysis based on operation and vibration measurement data

[0061] (1) Analyze the cause of vibration in terms of oil inlet and outlet temperature:

[0062] Analyzing the inlet and outlet oil temperatures of each watt during operation shows that the temperature difference between inlet and outlet oil temperatures during 8-watt operation is analyzed. At 6-8°C, the temperature difference between the inlet and the return oil of 8 watts is obviously low, so it can be inferred that the load of 8 watts should be low; from the comparison of the temperature of the watts, although the temperature of the 8 watts is 91.4 ℃, it is the highest among the watts of...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 魏邦华吴明陈锦裕田涛李宏卢家良童益华刘检军江腊涛彭兴华
Owner CNNC FUJIAN FUQING NUCLEAR POWER
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