METHOD FOR MONITORING LUBRICATING CONDITION OF ROLLING BEARING

摘要

PURPOSE:To easily monitor a lubricating condition even with respect to the bearing incorporated in machine equipment even when an oil film is thick by monitoring the lubricating state of a rolling bearing on the basis of the amplitude of the inherent vibration generated from the rolling bearing during rotation. CONSTITUTION:At first, a rolling bearing 1 is rotated in the predetermined number of rotations while load is applied to the rolling bearing 1 in the axial direction thereof and inherent vibration frequency Fn is calculated from the spring constants Ki, Ke between an inner wheel 2 and rolling bodies 4 as well as between an outer wheel 3 and the rolling bodies 4 and the mass M of the rolling bodies 4. Next, the amplitude at the vibration frequency Fn of the bearing 1 during rotation is calculated and the upper limit value of the amplitude is set. When a vibration level exceeds the upper limit value, it is judged that a lubricating condition is abnormal.