Nuclear power starting water pump rolling bearing fault detection method and system

Abstract

The invention discloses a nuclear power starting water pump rolling bearing fault detection method and system, and the method comprises the steps: building a bearing fault diagnosis model based on a convolutional neural network, determining model parameters through employing a simulation experiment based on a control variable method, and obtaining a fault diagnosis result based on the determined model parameters. And training the bearing fault diagnosis model by using the original operation data of the nuclear power starting water pump rolling bearing and the working condition label corresponding to the original operation data to obtain a bearing fault diagnosis model. The convolutional neural network parameters are optimized by using a method based on experimental research, so that the model training efficiency is further improved; according to the method, the end-to-end characteristic of the convolutional neural network is utilized, internal mechanism analysis, Fourier transform and other links are skipped, the method directly acts on original data, original information is prevented from being lost, experiments and theories are combined, a fault diagnosis model is optimized, accurate maintenance of the nuclear power starting water pump rolling bearing is achieved according to fault diagnosis, and the maintenance efficiency of the nuclear power starting water pump rolling bearing is improved. And the operation efficiency of nuclear power enterprises is further improved.

Description

technical field [0001] The invention relates to the technical field of intelligent operation and maintenance, in particular to a method and system for detecting faults of rolling bearings of nuclear power starting water pumps. Background technique [0002] Nuclear power is one of the energy guarantees for my country's economic and social development. The nuclear power start-up water pump is mainly used to provide start-up feed water for steam generators under normal operating conditions, and backup feed water when the booster pump / main feed water pump fails. Its health status is related to nuclear power plants. Safety and economics during start-up and shutdown. The rolling bearing is an important supporting part of the starting water pump of the nuclear power unit, and its health directly affects the performance, power, and life of the starting water pump equipment. [0003] At present, nuclear power enterprises mainly adopt regular maintenance strategies to maintain the rel...

AI Technical Summary

Problems solved by technology

[0007] ①Under different environments, the generality of the algorithm cannot be guaranteed, and the fault diagnosis method for rolling bearings of nuclear power start-up pumps has not been reported yet

[0008] ② Existing traditional bearing fault diagnosis technology needs to analyze the internal mechanism of the fault first, and then extract key characteristic signals, which has a high technical threshold and is difficult

[0009] ③ Existing data-driven feature extraction methods need to perform Fourier transform or wavelet transform first, and there is a possibility of losing important time-domain features

[0010] In addition, the current nuclear power units mainly rely on engineering experience in the decision-making of maintenance plans, and the efficiency of operation and maintenance management is not high, and the related inventions of intelligent operation and maintenance methods for rolling bearings of nuclear power start-up pumps have not yet been reported.

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