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Method for diagnosing faults of train couplings, related system, and train

A diagnostic method and technology of a diagnostic system, applied in railway vehicle testing, mechanical component testing, machine/structural component testing, etc., can solve the problem of installing a large number of additional sensors, low diagnostic accuracy, and failure to lock the fault location in vibration signal diagnosis. problems, to achieve the effect of reducing costs and accurate real-time diagnosis

Active Publication Date: 2019-12-20
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The coupling is located in the running part of the power-distributed EMU, but because the coupling is a rotating part, it cannot be monitored and diagnosed by directly installing sensors, which is a blind spot for monitoring the key components of the running part of the EMU.
At present, the diagnosis of train couplings is divided into two types: on-board equipment diagnosis and ground equipment diagnosis. The on-board equipment diagnosis mostly installs sensors such as vibration, temperature, and speed, and can indirectly diagnose coupling faults through comprehensive analysis. Due to the low diagnostic accuracy and the structural characteristics of the coupling, there are shortcomings such as low diagnostic accuracy and the need to install a large number of additional sensors; the ground equipment diagnosis is mainly judged by the image, vibration and other signals when the vehicle passes by, and there is a problem that it cannot be diagnosed in real time. In addition, if the coupling There are no visually identifiable faults such as broken joints, ground equipment cannot be diagnosed through image recognition, and vibration signal diagnosis cannot lock the faulty part to the coupling

Method used

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  • Method for diagnosing faults of train couplings, related system, and train
  • Method for diagnosing faults of train couplings, related system, and train
  • Method for diagnosing faults of train couplings, related system, and train

Examples

Experimental program
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Embodiment 1

[0053] Embodiment 1 of the present application provides a method for diagnosing a fault of a train coupling, which will be described in detail below with reference to the accompanying drawings.

[0054] see figure 1 , which is a flow chart of a method for diagnosing a train coupling fault provided in an embodiment of the present application.

[0055] The method described in the embodiment of the present application includes the following steps:

[0056] S101: Acquire current values ​​of traction motors of at least two power carriages when it is judged that the train is in an accelerated traction state and the running speed of the train is greater than or equal to a preset speed.

[0057] Through experiments and research, it is found that the current value of the traction motor of the power carriage where the faulty coupling is located is significantly smaller than the current of the traction motor of the normal power carriage during the traction start phase of the train, and ...

Embodiment 2

[0097]Based on the diagnostic method for coupling faults provided in the above-mentioned embodiments, Embodiment 2 of the present application also provides a coupling fault diagnostic system. The power carriage includes a traction motor and a traction converter, the traction converter supplies power to the power motor, and the coupling of the power carriage is used to connect the traction motor and the gearbox, which will be described in detail below with reference to the accompanying drawings .

[0098] see Figure 4 , which is a schematic diagram of a coupling fault diagnosis system provided in Embodiment 2 of the present application.

[0099] The system described in this embodiment of the present application includes: 401 a first acquisition unit, 402 a second acquisition unit, 403 a first determination unit, and 404 a second determination unit.

[0100] The first acquisition unit 401 is used to acquire the current values ​​of the traction motors of at least two power car...

Embodiment 3

[0125] Based on the train network system provided in the above embodiments, the embodiment of the present application also provides a train, which will be described in detail below with reference to the accompanying drawings.

[0126] see Figure 5 , which is a schematic diagram of a train provided in Embodiment 3 of the present application.

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Abstract

The application provides a method for diagnosing faults of train couplings, a related system, and a train, and relates to the technical field of vehicle control. The train is a power decentralized EMUincluding multiple power carriages, each power carriage comprises a traction motor and a traction converter, and the couplings of the power carriages are used to connect the traction motor sand gearboxes. The method comprises the following steps of obtaining the current values of the traction motors of at least two power carriages when determining that the train is in an accelerated traction state and the running speed of the train is greater than or equal to a preset speed; obtaining the average value of the current values of the traction motors of the at least two power carriages; determining the difference between the average value of the current values and the current value of the traction motor of each power carriage; and determining that the coupling of the power carriage with a difference greater than the preset threshold is faulty. By using the method, accurate real-time diagnosis of coupling faults can be achieved, and the cost is reduced with no additional equipment such assensors needed.

Description

technical field [0001] The present application relates to the technical field of vehicle control, and in particular to a fault diagnosis method of a train coupling, a related system and a train. Background technique [0002] As one of the key transmission components of the vehicle, the coupling of the gearbox is mainly responsible for transmitting the power of the traction motor to the wheelset, which plays a vital role in the safe operation of the train. With the continuous increase of the speed of my country's rail transit EMUs, the operating environment of its gear transmission system has become increasingly harsh, and the system has long been subject to internal incentives such as stiffness excitation, error excitation, and meshing impact excitation generated by gear meshing. In addition, the high-speed train gearbox coupling will also be subjected to external excitations caused by track irregularities, wheel-rail impact, wheel defects, etc., which will increase the prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/08G01M13/022
CPCG01M13/022G01M17/08
Inventor 林森王延翠蒋博文周诗林王双全
Owner CRRC QINGDAO SIFANG CO LTD