The present application relates to a
thrust bearing full-life fault diagnosis method and
system based on film thickness and wear. The method comprises: first establishing
failure probability models for two stages, i.e., a
lubrication failure stage and a wear failure stage, and simultaneously representing a
lubrication state and a wear state of a bearing in the form of probabilities; then, performing a normal distribution test on
monitoring data, and performing normal distribution conversion on
abnormal distribution data; and finally, by using the established
failure probability models for the two stages, i.e., the
lubrication failure stage and the wear failure stage, and the acquired normal distribution data, performing diagnosis on the lubrication state and the wear state of the bearing on the basis of a 3σ criterion, thereby realizing full-life fault monitoring. In the present invention, failure evolution situations of two stages, i.e., a lubrication stage and a wear stage, of a
thrust bearing are represented in the form of probabilities, so as to realize the full-life fault diagnosis of the
thrust bearing, thereby addressing the current gap in research on dynamic fault diagnosis throughout the full-life cycle of thrust bearings, and improving the accuracy of fault early warning and condition-based maintenance of the thrust bearings under actual working conditions.