Gear fault diagnosis method in railway locomotive gearbox

A railway locomotive and fault diagnosis technology, which is applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., and can solve problems such as failures that cannot be identified

Inactive Publication Date: 2020-06-30
HUNAN VOCATIONAL COLLEGE OF RAILWAY TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The present invention aims at the problem that in the prior art, the gear fault diagnosis method is very simple, which can only detect gear faults but cannot identify specific faults

Method used

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  • Gear fault diagnosis method in railway locomotive gearbox
  • Gear fault diagnosis method in railway locomotive gearbox
  • Gear fault diagnosis method in railway locomotive gearbox

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example

[0081] Using the gear parameters of the HXD1C transmission system as the basis, according to the different speeds of the pinion gears of the HXD1C locomotive, the speed of the locomotive is 120km / h, that is, the speed of the pinion gear is 342.79rad / s for signal simulation, the sampling frequency is 4096, and the number of sampling points The setting is 2048, and the number of teeth of the pinion is selected as 17. The specific gear parameters are shown in Table 1. Vibration signals corresponding to gear faults at a constant speed are established through Matlab. The simulated gear vibration signal types include gear normal operation, gear wear, gear broken teeth, and gear pitting, four common fault types.

[0082] Table 1 Gear parameters of HXD1C transmission system

[0083] gear modulus Number of teeth Tooth angle Addendum height factor full tooth height Radial variation coefficient big gear 9 106 20° 1.125 23.6248 -0.4085 gear 9 17 20...

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Abstract

The invention discloses a gear fault diagnosis method in a railway locomotive gear box. The method comprises the following steps: S1, collecting various fault vibration signals of a locomotive gearbox; S2, calculating various information entropies of the fault of the gear box of the locomotive; S3, establishing an information entropy point sample library of various locomotive gear box faults; S4,acquiring a vibration signal in the gear box to be diagnosed, and establishing an information entropy point of the gear; and S5, identifying the faulty gear by utilizing the information entropy mean distance. According to the method, the vibration sensor is used for collecting the gear to extract the information entropy characteristic index in the vibration signal, and on the premise that the change rule of the information entropy characteristic index and the gear fault is obtained, the quantitative relation between the information entropy and the gear fault is obtained. On the basis of obtaining multiple measurement information entropy features, an information entropy mean distance diagnosis method is adopted to diagnose the fault of the gear. Due to the fact that the information entropycan eliminate redundant information in the fault signals, fault features in the average information amount are obtained, and the diagnosis effect on gear faults can be improved.

Description

technical field [0001] The invention relates to a method for diagnosing a railway locomotive, in particular to a method for diagnosing a gear failure in a gearbox of a railway locomotive. Background technique [0002] At present, railway transportation plays the main role of the modern transportation industry, but with the increase of train speed and load capacity, more stringent requirements are put forward for the safety of train operation. Train locomotives usually run at high speed or with heavy loads, which can easily cause nonlinear and non-stationary vibrations in the running parts, resulting in failures such as tooth fracture, tooth surface fatigue, tooth surface scratches, and tooth surface wear in the gearbox. The running part of the locomotive could not work normally, and even caused a major train accident. [0003] With the rapid development of the railway industry, the fault diagnosis of the running part of the locomotive has also received extensive attention. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/021G01M13/028
CPCG01M13/021G01M13/028
Inventor 谭浩宇郭倩文陈湘颜毅斌
Owner HUNAN VOCATIONAL COLLEGE OF RAILWAY TECH
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