On A Test System For Rolling-element Bearings By Air-oil Lubrication

In this master degree project,a high-speed rolling-element bearing tester has been developed successfully,including hardware and software,which can achieve the maximum speed of 20000r/mim.With the maximum axial loading of 500 kg and the maximum radial loading of 250 kg,this high-speed machine can be used to text several kinds of rolling bearings.During the experiment,vibration and temperature about the testing bearings could be collected and recorded automatically.The main word includes:1.An overall design about the high-speed rolling bearing tester has been given.Detailed design and checking of axial loading elements are finished.Further more,this project gives the mainly design procedure of the spindle.The bearings used in the spindle are calculated to make sure their lives are long enough.2.How to choose step motor and single-phase AC motor are described.This thesis also shows how to drive these different motors based on PLC to realize their function on the whole machine.The pressure data are acquired by AD module from PLC.At last,all these control functions are put into a touch screen,which do easy to the user.3.Using the develop med system,the temperature characteristics of rolling bearing under the condition of air-oil lubrication has been measured in the preliminary test,validating the reliability and credit ability of the test system.