BEARING ABNORMALITY PREDICTION DEVICE AND BEARING ABNORMALITY PREDICTION METHOD

To provide a bearing abnormality prediction device and a bearing abnormality prediction method each of which allows for prevention of such a trouble that a rolling bearing becomes unrotatable due to excessive temperature rise in the rolling bearing, and thereby allowing for reduction in an economic loss or the like due to abnormality of the rolling bearing and the like.SOLUTION: A bearing abnormality prediction device 15 predicts an excessive temperature rise of a rolling bearing 3 capable of being loaded with axial load. The bearing abnormality prediction device comprises: load detection means 14 detecting an axial load acting on the rolling bearing 3; and determination means 16 determining presence of a sign of an excessive temperature rise in the rolling bearing 3 using the detected value. When the load detection means 14 is installed at a place where the axial load increases according to the temperature rise of the rolling bearing 3, the determination means 16 determines presence of a sign of an excessive temperature rise in the rolling bearing 3 when the detected axial load or an increase amount of the axial load exceeds respectively corresponding threshold values.SELECTED DRAWING: Figure 1 【課題】転がり軸受における過度の昇温に起因して転がり軸受が回転不能となることを防止し、転がり軸受等の異常による経済的損失等を削減することができる軸受異常予知装置および軸受異常予知方法を提供する。【解決手段】軸受異常予知装置１５は、アキシアル荷重を負荷可能な転がり軸受３の過度の昇温を予知する。転がり軸受３に作用する軸方向荷重を検出する荷重検出手段１４と、この検出値を用いて転がり軸受３に過度の昇温の兆候があることを判定する判定手段１６とを備える。判定手段１６は、荷重検出手段１４が、転がり軸受３の温度が上昇するに従って軸方向荷重が増大する箇所に設置された場合検出される軸方向荷重またはこの軸方向荷重の増大量がそれぞれに対応する閾値を超えたとき、転がり軸受３に過度の昇温の兆候があると判定する。【選択図】図１