2319 超音波を用いた転がり軸受異常検出法(GS 一般講演)

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概要

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• Ultrasound is used to detect flaws on the race of rolling element bearings. The ultrasound probe is attached to the outer ring of a bearing with an acrylic attachment. Transient variation in the strength of the reflection wave from the outer-ring race is recorded and then processed by FFT (Fast Fourier Transform). The FFT result of a normal bearing shows peaks only at the frequency of passage of for rolling elements on the outer-ring race, Zfc. While, the results of a bearing with an imitation flaw on the inner-ring race shows peaks not only at Zfc but also at the frequency of passage of rolling elements on the inner-ring race, Zfi. When the imitation flaw is about 4 micrometers in depth, and when its length is 10 percent of the circumference of the inner-ring race, the ratio of the height of the peaks of Zfi and Zfc is more than one quarter. Thus, we can detect the flaw on the inner-ring race by comparing the height of peaks of Zfi and Zfc.

• 一般社団法人日本機械学会の論文
• 2006-05-28

著者

• 辺見 真

  日立機械研

関連論文

• 2319 超音波を用いた転がり軸受異常検出法(GS 一般講演)

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