Evaluating load distribution at the bearing-housing interface using thin film pressure sensors

The objective of this investigation was to utilize thin film pressure sensors to evaluate the pressure distribution between rolling element bearings and a housing. A test rig was constructed to place thin film sensors around the perimeter of a test bearing inside of a housing. High precision drive shafts were manufactured that produce a light and heavy interference fit with each of the test bearings. Pressure map results are used to evaluate the effect of internal clearance on the load distribution of different bearing types. The thin film sensor system was also used to investigate the circumferential load distribution on the housing. The presented apparatus and test method could be used to validate bearing fit selection and housing design.