Study On A Skidding Damage Simulation Test Rig For High Speed Rolling Bearing

In aircraft engines, high-speed cutting machines and other equipment, high speed rolling bearings, working as the key elements, directly determine the performance of the entire device systems. Skidding damage is one of the common failure modes of high speed rolling bearings, but its theoretical research is not satisfactory. Therefore, it is necessary to analyze the failure mechanism of skidding damage with experimental methods. In this paper, a skidding damage test rig for high speed rolling bearings is developed, to investigate the influence of slip on skidding damage under harsh conditions, and then to provide some experimental evidences for evaluating bearing performances and improving the structure design of bearings.The overall scheme of the test rig is proposed, based on the investigation of various types of existing high speed bearing test rigs. Different slip ratio is achieved by respectively controlling the rotating speed of the two spindles. In the test rig, a vibration exciter and a high temperature lubricating oil system are employed to simulate the actual harsh running conditions of high speed rolling bearings. The test rig is composed of shaft structure, drive system, loading system, lubricating system, measurement and control system.The structural design and 3D modeling of the test rig are carried out using the CAD software SolidWorks. ANSYS Workbench is employed to achieve the static and dynamic FEM analysis, where the FEM model of the shafting system is formed by replacing the bearing with a spring element. Natural frequencies are directly identified from the modal analysis to ensure that the shaft can work safely and steadily and avoid resonance. Harmonic response analyses are performed to obtain the steady-state response of the shafting system under the exciting force.The measurement and control system is established using the virtual instrument technology. The acquisition of analog signals and the output of digital signals are accomplished through LabVIEW and a data acquisition card. The setting and controlling of some equipment parameters, like the speed of the electric spindles and the value of the temperature controller, is realized by the LabVIEW serial communication function. The intelligent control of the test rig is simulated using the LabVIEW program, where the collected data can be stored, displayed and analyzed, and monitoring and warning function for some important parameters is also realized.