Research On Head Sheave Fault Diagnosis And Prediction And Intelligent Lubrication System

As a key load-bearing component of the mine hoisting system,the head sheave is responsible for the load and power transmission of the mine hoist.In the actual work of the mine,early detection of faults can help avoid accidents.Through the method of status signal acquisition and fault diagnosis,we can grasp the operation status of the head sheave,discover the fault parts as early as possible,and ensure the safe and reliable operation of the head sheave.And most of the reasons for the failure of the head sheave bearings are due to the long-term failure of adequate lubrication of the parts,so the research into intelligent lubrication system is very necessary to prevent the occurrence of failure.In summary,this paper carries out research on bearing fault diagnosis and intelligent lubrication.The main contents are as follows:(1)A study of bearing fault diagnosis based on optimization SVM.Fault diagnosis is accomplished in two parts: first,fault feature extraction,decomposition of the signals of each operating condition of rolling bearings using the improved LMD method,followed by the selection of suitable PF components using correlation analysis,and then the formation of feature vectors by calculating their approximate entropy;Secondly,fault mode identification is performed by using GS to optimize the SVM model parameters and establish a GS-SVM classification model.The bearing fault diagnosis prediction is performed by inputting the feature vectors extracted from the features into the GS-SVM classification model.Through simulation experiment analysis,the prediction accuracy of this diagnosis method reaches 98.33%on the data set of Western Reserve University,which verifies the accuracy and effectiveness of the scheme in bearing fault diagnosis.(2)According to the actual application and demand of the hoist head sheave,the overall scheme design of the intelligent lubrication system of the overhead wheel is carried out.The key points in the scheme are refined,including the selection of lubricating grease and lubricating oil pump as well as the electric control design of the lubrication system.(3)The hardware circuit of the control system of the lubrication equipment of the head sheave was designed.The overall scheme of the hardware system is determined according to the functional requirements of the lubrication system.The hardware schematic includes a microprocessor circuit,signal acquisition circuit,relay drive circuit,RS485 communication circuit,and power supply circuit,and the design of the PCB board diagram is completed on the basis of the hardware schematic design.(4)The development and design of the upper computer and lubrication system are completed.The host computer is developed by the Qt platform to realize the functions of lubrication parameter setting,lubrication data display and storage,and lubrication point status detection.Lubrication system based on Keil software programming to achieve the lubrication system’s main program design,key scanning program design,communication program design,and testing program design.After the program’s debugging and modifications,it can be successfully run and achieve the relevant functions.