A method for judging the correctness of bearing parameters and automatic multi-parameter diagnosis and matching

Abstract

Provided is a bearing parameter correctness determining and automatic multi-parameter diagnosing and matching method. During online bearing fault monitoring, An expert system determines the default bearing parameter correctness in a measuring point which includes sets of bearings of different types or a measuring point which includes a single set of bearings but may include bearings, of differenttypes or provided by different manufacturers, of different parameters, and a practical parameter of a fault bearing is identified automatically according to a bearing parameter liabrary. Thus, diagnosis mistakes or omission due to improper parameter configuration can be prevented, the applicability of monitoring equipment is improved, and correct maintenance is guided.

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 correctness judgment of bearing parameters and multi-parameter automatic diagnosis and matching. Background technique [0002] At present, in the field of online fault monitoring of bearings, my country's fault diagnosis technology based on generalized resonance / resonance demodulation is in the forefront of the world. However, new challenges have also emerged in the long-term application process. [0003] The realization of bearing online fault monitoring mainly involves two aspects of work: fault qualitative analysis and fault quantitative calculation. The fault qualitative analysis is to accurately locate the fault source according to the mechanical structure and motion law of the bearing, and it is the basis for precise diagnosis of the bearing. means. It is highly dependent on the geometric st...

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Problems solved by technology

If it is a motor bearing, the locomotive manufacturer must also obtain it from the bearing manufacturer through the motor factory. During the transmission process of parameter information, it is inevitable that there will be errors due to human factors and other factors.

[0005] Second, based on some considerations, when designing and selecting bearings for existing locomotives and subway vehicles, bearings from multiple bearing manufacturers are selected at the same time, which leads to the possibility of multiple bearing parameters in the same position on the same model phenomenon, and without dismantling, even the locomotive and vehicle manufacturers cannot determine which parameter is actually used, so it increases the uncertainty for the monitoring and diagnosis system

For example, the drive motor is equipped with a set of cylindrical bearings and a set of ball bearings at the non-drive end to meet the requirements of radial load and axial load at the same time, which makes the fault information source of the measuring point where the sensor is located not unique

[0007] Fourth, existing locomotives do not have matching design requirements for bearing parameters, as long as the inner diameter, outer diameter and bearing width of the bearing meet the installation requirements, so the overhaul factory must ensure that the inner diameter, outer diameter and bearing width are the same during the maintenance process In some cases, it is likely to replace the original bearing with another brand or type of bearing, which may cause changes in bearing parameters (such as rolling diameter, number of rollers, etc.), but the bearing parameter configuration library of the monitoring system has not been updated synchronously , resulting in incorrect bearing parameters of the monitoring system

[0008] Although my country's bearing online monitoring technology has been at the forefront of the world, but for the above problems, there is no mature and effective online technology for engineering application

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