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A method for diagnosing bearing axial scuffing and extended faults and reducing the faults

A fault and bearing technology, applied in the field of diagnosing bearing axial scratches and extended faults and reducing the fault, can solve problems such as insufficient cause, inability to identify, and small amplitude fluctuations

Active Publication Date: 2019-09-20
TANGZHI SCI & TECH HUNAN DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Its defect is that when a scratch with uniform scratches extends to the peeling, so that the peeling causes a greater impact, but because it is successively superimposed with the impact of other scratches without peeling, its amplitude fluctuates very little, especially However, it is still not enough to cause obvious side spectrum and modulation spectrum, so that the fault that has expanded into peeling cannot be identified; when a certain scratch of uniform scratches extends to a fracture, so that the fracture causes a greater impact, but If it is successively superimposed with the impact of other non-fractured scratches, its amplitude fluctuation is also very small, especially not enough to cause obvious side spectrum and modulation spectrum, so that it is still impossible to identify the fault that has extended to the fracture

Method used

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  • A method for diagnosing bearing axial scuffing and extended faults and reducing the faults
  • A method for diagnosing bearing axial scuffing and extended faults and reducing the faults
  • A method for diagnosing bearing axial scuffing and extended faults and reducing the faults

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Example 1, Recognition of peeling off of outer ring of axle holding bearing of a HX locomotive

[0064] A locomotive depot HX locomotive No. 3 measuring point bearing on the 1st axis was disassembled due to an alarm. It was found that there were multiple uniformly distributed axial scratches on the outer ring raceway. The distance between each scar was equal to the distance between the rollers, and one of the scratches extended. For peeling. This bearing is a bearing with a fixed outer ring and a rotating inner ring. According to the sample S0(i) saved by the existing bearing fault detection device using generalized resonance / resonance demodulation technology, such as Figure 4 It can be found that when the bearing rolling elements pass through the peeling belt in the load-bearing area, the rolling elements will have two impacts when they enter and leave the peeling area, and the impact waveform of the outer ring has "split" phenomenon. The method to identify peeling is:

...

Embodiment 2

[0070] Example 2, Scratch identification of the outer ring of the axle holding bearing of a HX locomotive

[0071] A large number of bearing alarms existed in the bearing of No. 4 measuring point on axle 1 of a certain section of HX locomotive. The alarm disappeared after replacing the wheel set of axle 1. After disassembly, the outer ring raceway has uniform axial scratches, and the scratch distance is equal to the distance between the rollers. According to the existing sample S0(i) saved by the bearing fault detection device using generalized resonance / resonance demodulation technology, such as Figure 8 , It can be found that the bearing rolling element will only trigger one impact when passing through the scratch point of the outer ring of the bearing area, so the impact waveform of the scratch is more crisp and there is no "split" phenomenon. The method to identify the outer ring scratches is:

[0072] The sample S0(i) is filtered for an integer number of cycles of the outer ...

Embodiment 3

[0077] Example 3, the identification of the fracture of the inner ring of the axle holding bearing of a HX locomotive

[0078] A large number of bearing alarms existed in the bearing of No. 3 measuring point on the 6-axis of a certain HX locomotive. After disassembly, the inner ring raceway was broken along the axial line. According to the existing sample S0(i) saved by the bearing fault detection device using generalized resonance / resonance demodulation technology, such as figure 1 It can be found that within the time of one revolution of the shaft, there are only 2 to 4 shock pulses generated when the damage passes through the bearing area, that is, the amplitude modulation of the impact of the shaft on the inner ring fault occurs, and the frequency spectrum is not only equal to the characteristic frequency of the inner ring fault In the main spectrum of fnei, there are side spectrums fnb that differ from the frequency of the main spectrum by an integral multiple of the shaft fr...

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Abstract

The invention relates to a method for diagnosing axial abrasion and extension faults of a bearing and a method for reducing the faults. In allusion to an outer ring and an inner ring of the bearing, in-depth diagnosis for whether there is uniformly distributed axial abrasion, abrasion extended peeling and abrasion triggered breakage or not is achieved, so that the residual service life of a bearing having only uniformly distributed abrasion which does not extend into peeling or breakage yet is continuously utilized, and the bearing is replaced immediately when the abrasion extends into peelingor breakage, thereby achieving the purposes of not only being capable of sufficiently utilizing the residual life of the abrasion bearing and improving the economic benefits, but also being capable of timey recognizing and replacing the fault extension bearing and preventing the occurrence of an accident, guiding reasonable selection and replacement of the bearing, preventing frequent occurrenceof uniformly distribution abrasion and subsequent faults, and improving the equipment reliability.

Description

Technical field [0001] The invention belongs to the technical field of rail transit vehicle fault diagnosis, safety protection and reliability design, and relates to a method for diagnosing bearing axial scratches and expansion faults and reducing the faults. Background technique [0002] Rail transit is developing rapidly in our country and entering the international market. High speed and heavy load are the main theme. But the problem that followed was that the bearings used, including wheel axle box bearings, axle suspension bearings that suspend the motor on the axle, gearbox bearings and motor bearings had a relatively high failure rate. Among them, the tapered roller bearings used The inner and outer rings and the rolling working surfaces of the rollers are used to bear large axial loads, instead of the sliding working surfaces of the roller ends when cylindrical roller bearings are used, and the failure rate is greatly reduced. But its special failure phenomena (inner ri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/04
Inventor 唐德尧王智
Owner TANGZHI SCI & TECH HUNAN DEV CO LTD