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ころがり軸受異常診断装置の開発

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.13 (1981) No.3

ころがり軸受異常診断装置の開発

Development of Portable Detector of Defects in Rolling Bearings

宮崎 容治(Yasuharu Miyazaki) 土井 克彦(Katsuhiko Doi) 小松 重之(Shigeyuki Komatsu) 鷺沢 忍(Shinobu Sagisawa) 押谷 侃(Akira Oshitani)

要旨 : 保全部門において,ころがり軸受の異常を予知する技術は,ますます重要なものとなって きた。軸受の欠陥より発生する高い周波数の振動レベルが,異常の程度を知るために,従 来から利用されてきた。しかし,この方法では,たとえば新しい軸受の初期値との比較や, 欠陥の種類ごとの判定基準が必要である。開発した装置,F-K ベアリングヘルスチェッカ ーは,欠陥の程度を軸受から発生する振動加速度に基づく尺度Q で示すようになっている。 この尺度Q は,装置に内蔵した重み付け回路と計算回路によって自動的に求めるようにし ており,特別の技術や,欠陥の種類ごとの判定基準を必要としない。重み係数と計算式は, 実際の使用時に破損した2000 個に及ぶ軸受の振動の解析と欠陥の観察によって得られたも のである。 Synopsis :

In the field of maintenance, the importance of techniques for predicting defects in rolling bearings has been increasingly recognized. To determine the extent of defects, the level of high frequency vibration generated by the defects has so far been used. However this method requires special techniques such as a comparison between the initial and the current values of the bearing and also setting-up of criteria corresponding to respective defacts. The newly developed F-K Bearing Health Checker indicates the extent of a defect with a new induced scale "Q," which is evaluated automatically by the built-in weighting network and calculating circuit, thereby requiring neither special techniques nor criteria according to the types of defects. The weighting factor and calculating formula are obtained from vibration analyses and visual observation of defects in 2000 bearings which were damaged in the course of actual operation.

(c)JFE Steel Corporation, 2003

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