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Bolt fault diagnosis method and device

A fault diagnosis device and fault diagnosis technology, applied in the direction of measuring devices, mechanical devices, mechanical measuring devices, etc., can solve the problems of bolt group monitoring, fault diagnosis, and inability to effectively diagnose bolts, etc., to achieve a wide range of applications and improve self-adaptation ability, ease of statistical analysis and modeling of effects

Pending Publication Date: 2021-11-16
DONGFANG ELECTRIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a method and device for bolt fault diagnosis, which solves the problem in the prior art that all bolts cannot be effectively diagnosed through limited measuring points, thereby solving the problems of existing equipment bolt group monitoring and The Difficulty of Troubleshooting

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  • Bolt fault diagnosis method and device
  • Bolt fault diagnosis method and device
  • Bolt fault diagnosis method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as Figure 1 to Figure 5 As shown, a bolt fault diagnosis method includes the following steps:

[0051] S1, carry out the bolt failure simulation test, and record the monitoring data of the bolt failure monitoring point;

[0052] S2, simulating bolt faults through the finite element method, and establishing a virtual fault case library;

[0053] S3, extract the fault features in the virtual fault case library, and perform artificial intelligence modeling on the bolt fault of the real machine.

[0054] The present invention solves the problems of limited number of bolt fault monitoring points, limited arrangement of bolt fault monitoring points, and rapid diagnosis of fault points through bolt fault simulation tests, fault simulation, artificial intelligence modeling, and the like. Through the finite element simulation, the virtual fault case library is established, and the automatic diagnosis of the bolt faults of the real machine can be realized, which is convenie...

Embodiment 2

[0066] Such as Figure 1 to Figure 5 As shown, as a further optimization of Embodiment 1, this embodiment includes all the technical features of Embodiment 1. In addition, this embodiment also includes the following technical features:

[0067] A bolt fault diagnosis device applied to the bolt fault diagnosis method described above includes a bolt 1 , a bolt axial force monitoring instrument 2 connected to the bolt 1 , and a load simulation device 3 connected to the bolt 1 .

[0068] The load simulation device 3 provides simulated loads for the failure of the bolt 1, and the bolt axial force monitoring instrument 2 monitors the bolt axial force in the process of the failure of the bolt 1 in real time, so as to facilitate the diagnosis of the failure of the bolt 1.

[0069] As a preferred technical solution, the load simulation device 3 is a jack.

[0070] The jack applies loads well and is easy to install.

[0071] As a preferred technical solution, the bolt axial force moni...

Embodiment 3

[0076] Such as Figure 1 to Figure 5 As shown, on the basis of Embodiment 1 and Embodiment 2, this embodiment provides a more detailed implementation manner.

[0077] The fault simulation device consists of base 5, base fixing bolt 6, flange 7, test bolt (i.e. bolt 1), test nut 8, jack (i.e. load simulation device 3), jack support plate 9, dial indicator (i.e. Bolt length monitoring instrument 4), bolt force sensor (ie bolt axial force monitoring instrument 2), force measuring washer 10, see figure 1 .

[0078] When in use, the base 5 is fixed on the test bench by the base fixing bolt 6; the flange 7 is connected to the base 5 according to the set preload by the test bolt and the test nut; the external load of the work is accurately simulated by the jack . The bolt force sensor is consistent with the real machine, and the ultrasonic force sensor is preferred. The elongation value of the test bolt is monitored by a dial gauge.

[0079] The test bolts of this device are 8 M...

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Abstract

The invention discloses a bolt fault diagnosis method and device, and the method comprises the following steps: S1, carrying out a bolt fault simulation test, and recording the monitoring data of a bolt fault monitoring point; S2, simulating a bolt fault through a finite element method, and establishing a virtual fault case library; and S3, extracting fault features in the virtual fault case library, and carrying out artificial intelligence modeling on real machine bolt faults. According to the invention, the problem that all bolts cannot be effectively diagnosed through limited measuring points in the prior art is solved, so that the problems of bolt group monitoring and fault diagnosis of existing equipment are solved.

Description

technical field [0001] The invention relates to the technical field of bolt fault diagnosis, in particular to a bolt fault diagnosis method and device. Background technique [0002] The top cover is one of the key components of the turbine, and its main function is to fix the water guide mechanism and bear the axial load of the unit. The top cover and the seat ring are connected by bolts. The vibration of the unit caused by uncertain factors will cause the bolts to bear variable amplitude loads, which will have a huge impact on the mechanical strength and fatigue life of the bolts. The Russian Sayan Hydropower Station abroad caused a major accident due to the fatigue failure of the top cover-seat ring bolts. The top cover-seat ring bolts of a pumped storage power station in China were fatigued and fractured when the turbine of a certain unit was shut down in an emergency, and the top cover was lifted. Cause major safety accidents (such as flooding of factory buildings, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/27G06F30/17G01L5/173G01B5/02
CPCG06F30/23G06F30/27G06F30/17G01L5/173G01B5/02Y02E10/20
Inventor 张猛周军长陈旭郭靖铎林刘云平宋敏唐磊赵政雷
Owner DONGFANG ELECTRIC MACHINERY
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