DEVELOPMENT OF ROTOR FAULT SIMULATION TESTING SYSTEM BASED ON LABVIEW

Many failures,such as unbalance,non-alignment,flexural,loose and collision wear,often worsen the dynamic properties of mechanical device.Monitoring and analyzing the rotor vibration signal is the principal method to identify the troubles type and to forecast the failure trend.Multi-function vibration testing system which simulates rotor failure in different operating condition was developed in this paper.Rotor dynamic balance,non-alignment and bearing fault could be simulated in this equipment by changing the wheel disc unbalance mass,adjusting bearing block height and controlling oil lubrication condition.Testing system was consisted of rotor experiment table,sensor and signal regulation facility,NI USB-6009 data acquisition card and computer.Testing software was developed with LabVIEW8.5.Acquisition and processing methods of three signals including rotation speed,acceleration and displacement were also detailed.Testing results indicated that time and frequency domain waveform of bearing block vibration signal and rotor axis locus form could be used to characterize rotor individual fault and complex fault in different working condition.