A bearing acoustic diagnosis system and method used in conjunction with a wheel set bearing running-in machine

A bearing and acoustic technology, applied in the field of acoustic diagnosis system of railway vehicle bearings, to achieve the effect of increasing working time

Active Publication Date: 2016-05-04
BEIJING CTROWELL INFRARED TECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In summary, the existing bearing inspection methods are difficult to quickly and preparatively diagnose a large number of bearings to be inspected

Method used

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  • A bearing acoustic diagnosis system and method used in conjunction with a wheel set bearing running-in machine
  • A bearing acoustic diagnosis system and method used in conjunction with a wheel set bearing running-in machine
  • A bearing acoustic diagnosis system and method used in conjunction with a wheel set bearing running-in machine

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Experimental program
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Embodiment Construction

[0028] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0029] A bearing acoustic diagnosis system combined with a wheel set bearing running-in machine, such as figure 1 , figure 2 As shown, it includes a bearing acoustic diagnosis workstation 101, a microphone 104, a microphone sound cover 103, and a microphone preamplifier 102;

[0030] The microphone 104 is located in the microphone cover 103, the microphone cover 103 is fixed on the outside of the bearing 105 within the range of 100mm to 1m through the support frame 110, the central axis of the microphone cover 103 is at the same height as the central axis of the bearing 105, and the microphone The opening direction of the sound cover 103 is facing the outer end cover of the bearing 105 .

[0031] The microphone 104 collects the sound signal of the bearing to form a microphone signal, which is input to the bearing acoustic diagnosis workstation 101 ...

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Abstract

The invention discloses a bearing acoustic diagnosis system and method used in combination with a wheel set bearing running-in machine. The system comprises a bearing acoustic diagnosis work station, a microphone, a microphone sound collecting cover and a front microphone amplifier, wherein the microphone is located in the microphone sound collecting cover, the microphone sound collecting cover is fixed to the outer side of a bearing through a supporting frame, the microphone collects a bearing sound signal and forms a microphone signal, and the microphone signal is output to the bearing acoustic diagnosis work station through the front microphone amplifier; the bearing acoustic diagnosis work station comprises an audio signal collecting card, four digital filters, a resonance envelope demodulation discriminator, a characteristic parameter discriminator and a specialist system, the specialist system performs calculation to obtain the envelope frequency spectrum, the crest factor, the clearance factor, the impact factor, the kurtosis factor and the shape factor of the bearing to be detected through the resonance envelope demodulation discriminator and the characteristic parameter discriminator, whether faults happen to the bearing to be detected or not is judged, and the fault types are obtained. Various faults of the bearing are discriminated by collecting the sound of the rotating bearing.

Description

technical field [0001] The invention belongs to the technical field of vehicle fault detection, and in particular relates to a railway vehicle bearing acoustic diagnosis system and method used in conjunction with a wheel set bearing running-in machine. Background technique [0002] Wheelset bearing failure of railway vehicles is one of the main failure sources in train operation, and it is also the biggest factor affecting train safety. Compared with other mechanical parts, a remarkable feature of rolling bearings is that their life spans are highly discrete, that is, the same batch of bearings manufactured with the same material, the same processing technology and production equipment, under the same working conditions , its life may also have a big difference. Some bearings have various failures when they are far from reaching the design life. It is of great significance to the safe operation of trains to improve the working potential and avoid or reduce the occurrence of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/04
Inventor 李渊张益陈曦周毛毛袁高斌陈佳斌姚剑博周立玮
Owner BEIJING CTROWELL INFRARED TECHN
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