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

摘要

A displacement sensor (70) detects the relative displacement between inner and outer rings of a bearing (60) by detecting the displacement of a main shaft (20). A data processing device (80) carries out abnormality diagnosis on the bearing (60) on the basis of the detection values of the displacement sensor (70). Further, the data processing device (80) carries out abnormality diagnosis on the basis of the difference between a displacement sensor (70) detection value when the bearing (60) is subjected to first axial load conditions and a displacement sensor (70) detection value when the bearing (60) is subjected to second axial load conditions different from the first axial load conditions. As a result, a rolling bearing abnormality diagnosis device is provided that is capable of obtaining highly accurate abnormality diagnosis even if the installation state of a displacement sensor and an object to be measured changes as a result of maintenance or repairs.