Study On Electrical Control System Of Durability Test Rig For High-speed Rail Bearing

Bearing is one of the key components of high-speed train running smoothly. China’s high-speed rail technology has made great progress, but the domestic high-speed bearings can’t satisfy the requirement, most bearings still have to be imported from abroad. In order to break the foreign monopoly situation, improve the reliability of domestic high-speed bearing, it is necessary develop high-speed bearing durability test-bed, to provide guidance and test for designing and manufacturing the high-speed rail bearing.This paper analyze the requirement of high-speed bearing durability test rig,,it determines the overall scheme of the control system, designs the hardware circuit of electric control system, develops control program and monitoring interface according to test procedures of high-speed bearing durability test-bed. Siemens S7-400PLC is adopted as core control system, thus the temperature and vibration of bearings can be detected in real time, the radial&axial loading and rotate speed can be controlled automatically in closed loop, the hydraulic loading system and lubricating system can also be realized condition monitoring. Based on the control program and monitoring interface of control system, by setting parameters, the control process like automatic test, preliminary test and manual manipulation of the endurance quality test can be achieved; monitoring conditions and filing of control variables, providing alarm information in real time can also be realized.After field installation and debugging, system calibration test and endurance test, this control system can run smoothly and reliably, can meet the accuracy requirement and control requirements of high-speed bearing durability test-bed.