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Power plant induced draft fan vibration fault diagnosis method

A technology of fault diagnosis and induced draft fan, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of unable to meet the requirements of online diagnosis of induced draft fan vibration faults, difficult real-time calculation and online analysis and judgment, and spectrum analysis method Problems such as high sampling frequency to achieve the effect of ensuring the rapidity of calculation, ensuring the accuracy of calculation, and reducing the requirements of maintenance personnel

Inactive Publication Date: 2019-08-30
SHANGHAI POWER EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The accuracy of the analysis results often depends on the experience of professional technicians and familiarity with the equipment, and staff with different technical capabilities may obtain inconsistent analysis results for the same result;
[0006] (2) The spectrum analysis method has a high sampling frequency and generates a large amount of data in the same period of time. It is difficult to complete real-time calculation and online analysis and judgment. It is often used in post-fault analysis and cannot meet the requirements of online diagnosis of induced draft fan vibration faults.

Method used

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  • Power plant induced draft fan vibration fault diagnosis method
  • Power plant induced draft fan vibration fault diagnosis method
  • Power plant induced draft fan vibration fault diagnosis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] For a certain type of induced draft fan, during the service period of the induced draft fan, use figure 1 the device shown, figure 2 The flowchart shown, image 3 The computer software shown and Figure 4 As shown in the fault code table, during operation, it is found that the induced draft fan has vibration and noise.

[0038] Step 1: Enter the online eigenvalue data into the eigenvalue data preprocessing server to complete data abnormal value interpolation;

[0039] The second step: standardize the online eigenvalue data after outlier interpolation;

[0040] Step 3: Input the standardized online eigenvalue data into the artificial intelligence fault classification server, and use the classification model of vibration fault and historical eigenvalue data to input the eigenvalue data of the above steps into the classification model for calculation.

[0041] Step 4: Calculate the vibration fault code value H 0 =1.26, according to the calculation formula H=Round(1.26)...

Embodiment 2

[0043] For a certain type of induced draft fan, during the service period of the induced draft fan, use figure 1 the device shown, figure 2 The flowchart shown, image 3 The computer software shown and Figure 4 As shown in the fault code table, during operation, it is found that the temperature of the induced draft fan bearing has risen.

[0044] Step 1: Enter the online eigenvalue data into the eigenvalue data preprocessing server to complete data abnormal value interpolation;

[0045] The second step: standardize the online eigenvalue data after outlier interpolation;

[0046] Step 3: Input the standardized online eigenvalue data into the artificial intelligence fault classification server, and use the classification model of vibration fault and historical eigenvalue data to input the eigenvalue data of the above steps into the classification model for calculation.

[0047] Step 4: Calculate the vibration fault code value H 0 =1.91, according to the calculation formul...

Embodiment 3

[0049] For a certain type of induced draft fan, during the service period of the induced draft fan, use figure 1 the device shown, figure 2 The flowchart shown, image 3 The computer software shown and Figure 4 As shown in the fault code table, during the operation, it is found that a slight metal friction sound can be heard at the casing of the induced draft fan.

[0050] Step 1: Enter the online eigenvalue data into the eigenvalue data preprocessing server to complete data abnormal value interpolation;

[0051] The second step: standardize the online eigenvalue data after outlier interpolation;

[0052] Step 3: Input the standardized online eigenvalue data into the artificial intelligence fault classification server, and use the classification model of vibration fault and historical eigenvalue data to input the eigenvalue data of the above steps into the classification model for calculation.

[0053] Step 4: Calculate the vibration fault code value H 0 =3.17, accordin...

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Abstract

The invention provides a power plant induced draft fan vibration fault diagnosis method, which comprises the following steps: representing the state of an induced draft fan through different characteristic values, setting characteristic value measuring points on the induced draft fan, and obtaining the detection data of each characteristic value through the characteristic value measuring points. According to the method, historical data and online data are combined, an artificial intelligence technology is utilized, the vibration fault coding value of the induced draft fan is calculated in realtime according to the online characteristic value data, the vibration fault of the induced draft fan is obtained, and maintenance guidance is conducted. According to the power plant induced draft fanvibration fault diagnosis method, the correlation between the vibration characteristic value data is considered, online fault diagnosis of the state of the induced draft fan is achieved, and a basisis provided for state maintenance of the induced draft fan.

Description

technical field [0001] The invention relates to a method for diagnosing vibration faults of induced draft fans in power plants, and belongs to the technical field of fans. Background technique [0002] In a power plant, the induced draft fan is one of the seven auxiliary machines, and its operating status is directly related to the safety and stability of the power plant. According to the classification of importance to the power plant, power plant equipment can be divided into key equipment, necessary equipment and auxiliary equipment, and fans are listed as key equipment. Therefore, it is of great significance to evaluate the state of induced draft fan. [0003] The induced draft fan mainly has different vibration failure modes such as unbalance, misalignment, looseness and bearing failure. How to judge what kind of vibration fault occurs in the induced draft fan, and then carry out related maintenance and treatment, has always been a problem that plagues the staff of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/28G06F16/245
CPCG06F16/245G06F16/285
Inventor 郭荣范佳卿汪勇张强臧剑南陈荣泽陈家颖孙猛崔希
Owner SHANGHAI POWER EQUIP RES INST
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