Condition Monitoring Of Bearing Equipment Of Metro Air Conditioning Unit Based On Systematics Platform

The metro air-conditioning unit is frequently used after it is put into operation,and it is prone to failure of the air-conditioning unit.Among them,the problem of hidden fire safety hazards in field equipment caused by belt friction and smoke caused by bearing failure is particularly prominent,which seriously affects the safe operation of the metro.At present,the monitoring information of metro air-conditioning unit equipment is relatively scattered and single in the metro integrated monitoring system platform and the environment and equipment monitoring system,and only the operation status of the air-conditioning unit equipment is monitored station by station.At the same time,due to the large number of air-conditioning units in the line network,the control center dispatch and professional personnel cannot cover all the air-conditioning unit equipment according to the inherent mode during the equipment monitoring and inspection process.The bearing of the unit is malfunctioning.Therefore,it is of great significance to study the real-time monitoring of the state of the bearing equipment of the metro air-conditioning unit.The thesis mainly uses the existing metro ventilation and air-conditioning system,integrated monitoring system,environment and equipment monitoring system as a platform to determine the operating status of the air-conditioning unit bearing equipment by obtaining real-time monitoring data,and take corresponding control measures according to the bearing failure status.The paper first analyzes the typical faults of the bearing of the air-conditioning unit,analyzes and compares a variety of bearing performance monitoring methods,studies and determines the pros and Existing metro equipment and network platforms,through the addition of vibration sensors,data monitoring points and other measures,realized bearing status detection and alarm and shutdown when vibration exceeds limit;at the same time,centralized integration of monitoring information of air-conditioning units at each station of the integrated monitoring system workstation,Provide a convenient and intuitive monitoring operation interface for equipment monitoring and operators.After the monitoring system for the bearing equipment of the metro air-conditioning unit was completed,the effectiveness of the system was verified by testing the on-site equipment.At present,the system has been installed and applied in the Xi’an Metro network,and the failure prevention effect is obvious after the system goes online.