Reliability Analysis And Fault Diagnosis By Multilevel Flow Models For Mine Hoist

Mine hoist is used to transport materials, personnel movements of the equipment, the lifting of the elevator determines the amount of coal production, in the event of failure, It will affect the amount of coal mining.Mine hoist mainly includes the mechanical system, hydraulic system and electronic control system of the three parts, each component has its own complex internal structure, any part of the failure, will have an impact on production and economic losses.The reliability analysis method based on the multilevel flow model(MFMRA ) can decompose the complicated system into different functional layers. It is different from the traditional reliability analysis method. It is based on the successful system reliability analysis technology, which can directly model and simulate the system.The reliability of each system is obtained by MFMRA calculation, and the system is evaluated. The alarm information is analyzed, and the fault search is carried out according to the established multilevel flow model path, so as to locate the fault and achieve the purpose of fault diagnosis.In this paper, by studying the basic principles of multilevel flow model ( MFM) , modeling methods and fault diagnosis rules, MFM is applied to mine hoist system, MFM modeling of hydraulic station and main circuit. MFMRA is used to calculate the reliability of each target,and the reliability of each target is obtained. The correctness of the result is verified by GO method. The concept of time point is introduced, and the reliability of the normal working process of the hydraulic station is obtained. A faulty tree and Failure Mode and Effect Analysis (FMEA)based on multilevel flow model are established.Using the rules of fault diagnosis, a fault diagnosis and analysis process of electronic control system based on MFM is established, and a simulation model of power system is built by PSCAD circuit simulation software to verify the correctness of MFM fault diagnosis method. Finally, the application of C language, the development of MFM graphical modeling platform to improve the efficiency of MFM modeling.This paper from the perspective of reliability and fault diagnosis,Respectively to the elevator hydraulic station and electronic control system for reliability analysis and fault diagnosis. On the one hand to improve the safety and reliability of the operation of the hoist, and the system can predict the operation of the system so that it can better achieve safe production; the other hand, when the failure, you can quickly find the source of the fault, greatly shortened System maintenance time. To ensure the safety of coal production and improve the reliability of the hoist is of great significance.