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A Method of Fault Diagnosis

A fault diagnosis and fault frequency technology, applied in the testing of machine/structural components, testing of mechanical components, instruments, etc., can solve problems such as incompleteness and inaccurate judgment of bearing faults

Active Publication Date: 2021-05-11
LINGDONG NUCLEAR POWER +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to overcome the defects of inaccurate and incomplete judgment of existing bearing faults and provide a fault diagnosis method

Method used

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  • A Method of Fault Diagnosis
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  • A Method of Fault Diagnosis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Please refer to figure 1 , fault diagnosis methods include:

[0039] 101. Detect the bearing, and obtain the bearing impact energy value and spectrum of the shaft from the detection end. Specifically, the vibration analyzer detects the bearing to obtain the vibration data of the bearing. The vibration data is processed by a computer to obtain the impact energy value, velocity spectrum, and velocity trend graph, waterfall graph;

[0040] 102. Determine the interval according to the impact energy value. If the impact energy value falls into the interval [2E, 3E), go to step 103. If the impact energy value falls in the interval [3E, 10E), go to step 107. E means the bearing is normal and stable. Impact energy value during operation;

[0041] 103. Judging from the speed trend graph whether the amplitude has doubled or more than doubled, whether there is frequency multiplication or high frequency in the speed spectrum, and whether there are fault characteristics that disti...

Embodiment 2

[0051] Please refer to figure 2 , fault diagnosis methods include:

[0052] 201. Obtain the bearing impact energy value and frequency spectrum from the detection end;

[0053] 202. Determine the interval according to the impact energy value, if the impact energy value falls into the interval [2E, 3E), enter step 203; if the impact energy value falls within the interval [3E, 10E), enter step 206;

[0054] 203. Judging from the speed trend graph whether the amplitude has doubled or more than doubled, whether there is frequency multiplication or high frequency in the speed spectrum, and whether there is a fault feature distinguishing peaks in the waterfall graph, if any of the above fault features exists, enter the step 204;

[0055] 204. Judging from the frequency spectrum whether there is a fault frequency, if there is a fault frequency, enter step 205;

[0056] 205. Disassemble the bearing;

[0057] 206. Determine whether abnormal temperature, abnormal noise, white noise,...

Embodiment 3

[0062] Please refer to image 3 , fault diagnosis methods include:

[0063] 301. Obtain the bearing impact energy value and frequency spectrum from the detection end;

[0064] 302. Determine the interval according to the impact energy value. If the impact energy value falls into the interval [2E, 3E), enter step 303; if the impact energy value falls within the interval [3E, 10E), enter step 306. If the impact energy value fall into the interval [10E, +∞), then enter step 305;

[0065] 303. Judging from the speed trend graph whether the amplitude has doubled or more than doubled, whether there is frequency multiplication or high frequency in the speed spectrum, and whether there is a fault feature that distinguishes peaks in the waterfall graph, if any of the above fault features exists, enter the step 304;

[0066] 304. Judging from the frequency spectrum whether there is a fault frequency, if there is a fault frequency, enter step 305;

[0067] 305. Disassemble the bearin...

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Abstract

A fault diagnosis method, which obtains the bearing impact energy value and frequency spectrum from the detection end; judges the interval according to the impact energy value, if the impact energy value is in the enhanced supervision interval, judges whether the frequency spectrum has a fault feature, and if there is a fault feature, calculate according to the frequency spectrum Whether there is a fault frequency, if there is a fault frequency, disassemble the bearing; the impact energy value is located in the fault zone of the equipment, judge whether there is abnormal temperature, abnormal noise, white noise, high-frequency components, if any of the above characteristics appear, then perform lubrication, lubrication After the abnormal temperature, abnormal noise, white noise, and high-frequency components have not all disappeared, judge whether there is a fault frequency. If there is a fault frequency, disassemble the bearing. Since the present invention processes the impact energy in different zones, the bearing can be judged in different energy ranges combined with various fault features and fault frequencies that appear in the frequency spectrum, and the state of the bearing can be accurately judged, so that the bearing can be adjusted in the corresponding state. disintegration.

Description

technical field [0001] The present application relates to the technical field of bearing fault diagnosis, in particular to a fault diagnosis method. Background technique [0002] Bearing is one of the most widely used mechanical parts, and it is also one of the most easily damaged parts in mechanical equipment. Whether its working status is normal or not is directly related to the production and safety of the entire unit. Bearing failures are caused by fatigue spalling, wear, plastic deformation, corrosion, fracture, gluing, and cage damage. If the bearing failure is not diagnosed in time, it may lead to serious failure of machinery and equipment, resulting in huge economic losses, especially for nuclear power plants and other environments with high safety requirements. Therefore, diagnosing the fault characteristics of bearings has great practical significance to avoid serious faults and ensure the normal operation of mechanical equipment. [0003] Bearing faults have a d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor 王卫东刘涛黄前进万平生陈勇孙仁贵夏军文江世刚赵一云旷一众
Owner LINGDONG NUCLEAR POWER
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