Predicting the reliability of friction type bearings with zirconium ceramic bushing

Abstract

Abstract The paper considers the issues of assessing the reliability of friction type bearing when installing a zirconium ceramic bushing. The allegations regarding the possibility of calculating the reliability of a bearing based on the results of friction pair wear tests at a laboratory setup were made. On a universal friction machine, the tribological characteristics of a friction pair are investigated using a disk-finger scheme. The methodology of constructing the elemental wear law is substantiated, according to which the wear intensity of the ceramic bearing bushing is adjusted according to the conditions of its operation. Particular attention is paid to the reliability of the obtained laboratory tests for friction and wear. Only parametric bearing failure based on the accumulation of wear damage is considered. A procedure has been developed for calculating the reliability and service life of a friction type bearing, taking into account the real angle of contact zone contact, variation of the sizes and tolerances of the shaft and bearing bushing, the normal distribution of errors, as well as the load and sliding velocity in the bearing.