A Fault Diagnosis Method for Locomotive Wheelset Bearings Based on Angle-Time-Frequency Domain

A fault diagnosis and wheel set technology, applied in the direction of mechanical bearing testing, etc., can solve the problems of cumbersome fault diagnosis, inability to determine the location of bearing faults and quantitative judgment results, low diagnostic accuracy, etc., to achieve easy maintenance and promotion, real-time safety Monitoring and fault diagnosis, good results

Active Publication Date: 2017-03-08
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology

However, this method of fault diagnosis is cumbersome, and the diagnostic accuracy is low, and it is impossible to determine the bearing fault location and quantitative judgment results

Method used

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  • A Fault Diagnosis Method for Locomotive Wheelset Bearings Based on Angle-Time-Frequency Domain
  • A Fault Diagnosis Method for Locomotive Wheelset Bearings Based on Angle-Time-Frequency Domain
  • A Fault Diagnosis Method for Locomotive Wheelset Bearings Based on Angle-Time-Frequency Domain

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Embodiment Construction

[0038] Depend on figure 1 with figure 2 It can be seen from the figure that a fault diagnosis method for locomotive wheel set bearings based on angle domain-time domain-frequency domain includes the following steps:

[0039] The first step is to install the equipment.

[0040] Install a rotary encoder at the end cover of the locomotive wheel set bearing; install an acquisition instrument and an analyzer in the locomotive driver's cab, and install an acceleration sensor directly above the locomotive wheel set bearing box. The output of the rotary encoder and the acceleration sensor is connected to the input of the acquisition instrument, and the output of the acquisition instrument is connected to the input of the analyzer; the rotary encoder, the acceleration sensor, the acquisition instrument and the analyzer are all connected by cables. Under certain circumstances, other wireless connection methods can also be used for connection, as long as the normal transmission of the...

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Abstract

The invention discloses a fault diagnosis method for a locomotive wheel set bearing based on the angle domain-time domain-frequency domain, and belongs to the technical field of bearing testing. This method first analyzes the collected vibration acceleration signal of the locomotive wheel set bearing in the time domain and frequency domain to determine whether the bearing is in a fault state and the specific location of the fault, and then conducts a pioneering angle domain analysis on the vibration acceleration. Then the quantitative analysis data of the fault is obtained, so as to grasp the severity of the fault and provide basic data for the next fault monitoring. The present invention adopts an analysis method combining time domain, frequency domain and angle domain, which can accurately provide information such as whether the bearing is faulty, fault type, and fault severity, etc. The degree has an accurate monitoring method, which provides more abundant reference data for subsequent troubleshooting.

Description

technical field [0001] The invention belongs to the technical field of bearing testing. Background technique [0002] At present, the fault diagnosis methods of rotating machinery are becoming more and more mature, such as oil analysis method, ultrasonic flaw detection method, ferrography analysis method, temperature detection method, vibration analysis method and so on. Among these methods, the vibration analysis method has been widely used because of its high fault identification rate and simple and rapid detection method. At present, around the vibration analysis method, experts and scholars at home and abroad have developed a series of fault diagnosis algorithms, including wavelet analysis, empirical mode decomposition, shock pulse method, resonance demodulation method, time-frequency analysis method, etc. Although these methods have a high fault identification rate, most of them are used under harsh conditions, and are only effective for stable conditions, and are less...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/04
Inventor 杨绍普刘永强廖英英马增强赵志宏马新娜顾晓辉
Owner SHIJIAZHUANG TIEDAO UNIV
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