ROLLING BEARING ABNORMALITY DIAGNOSIS DEVICE, WIND POWER GENERATOR, AND ROLLING BEARING ABNORMALITY DIAGNOSIS METHOD

摘要

A displacement sensor (70) detects a displacement of a main shaft (20), thereby detecting a relative displacement between an inner race and an outer race of a bearing (60). A data processor (80) carries out an abnormality diagnosis for the bearing (60) based on a detected value of the displacement sensor (70). The data processor (80) carries out an abnormality diagnosis based on a difference between the detected value of the displacement sensor (70) under a first axial load condition for the bearing (60) and the detected value of the displacement sensor (70) under a second axial load condition different from the first axial load condition. Thereby, an abnormality diagnosing apparatus for a rolling bearing is provided, by which a highly accurate abnormality diagnosis can be implemented even if installation states of a displacement sensor and an object to be measured are changed due to maintenance or repair.