The Research On Analysis By Numerical Simulation And Fault Diagnosis Method Of Vibrating Body For Horizontal Vibrating Centrifuge

Coal washing is an important part of coal production.In the wet separation process,dehydration is an indispensable important link.In the existing coal preparation plant,centrifugal dewatering technology is more commonly used,and the main equipment is filtration centrifuges.Among them,the horizontal vibratory centrifuge is the key equipment for the coal dewatering of less than 50 mm in the coal preparation plant,and has a series of advantages compared to the vertical scraper unloading centrifuge.From the development trend of centrifuges in recent years,horizontal vibrating centrifuges have become the main coal dewatering equipment in various countries in active development.With the progress of society and the development of science,the degree of automation of mechanical equipment is also getting higher and higher.There may be a variety of reasons that may cause equipment failures during the operation of the equipment,making the equipment unable to operate normally or causing serious problems.At present,domestic coal preparation plants do not attach importance to fault diagnosis and monitoring of coal preparation machinery and equipment.Most coal preparation plants still use diagnostic systems such as regular maintenance and artificial senses.However,such information is insufficient to reflect the operating status of equipment.It cannot be truly discovered and predicted equipment failure,may lead to unnecessary losses caused by shutdowns and overhauls of the coal preparation plant due to failure of key equipment.This paper introduces the structural principle and components of vibrator in the WZYT horizontal vibrating centrifuge.The dynamics system of horizontal vibrating centrifuge with double body was simplified and the solid model of the WZYT horizontal vibrating centrifuge was established.Based on the finite element dynamic analysis,the inherent characteristics and dynamic response of the vibration part of the horizontal vibrating centrifuge are analyzed.According to the simulation result,the vibration characteristics of the horizontal vibration centrifuge and the frequency range of the ideal group are obtained,Simulate the running status of the horizontal vibration centrifuge and find the weak parts of the horizontal vibration centrifuge according to the simulation results,Afterwards,a summary of the fault diagnosis method based on vibration signals and fault diagnosis based on current signals is introduced.Based on this,a set of fault diagnosis and monitoring experiments for the weak parts of the horizontal vibration centrifuge were designed.Using data acquisition technology,the operation status signals of different parts of the equipment were collected,cached and analyzed by sensors and data acquisition cards.Mainly for three points of signal acquisition,including abnormal vibration of horizontal vibration centrifuge,bearing condition monitoring and motor condition monitoring.Through the LabVIEW software to display the spectrum of the signal,comparing the signals under normal and fault conditions,the fault features of the equipment fault can be found,laying the foundation for the intelligent monitoring of the vibrating centrifuge.