215 多段歯車減速機に非かみ合い成分で発生する単一周波数の騒音の原因個所の特定について(オーガナイズドセッション : O.S.2 音響・振動による診断技術I)

概要

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Noise problem likely happens due to an unexpected manufacturing fault. Sometimes the transmission system might have been installed to the production machinery and operated continuously, and hence it is impossible to investigate the problem in a lab room. Therefore, it is necessary to observe the noise or vibration on the site. This paper presents a case study to identify the cause of such noise that is observed as a non mesh- harmonic component which occurred at a big gear reduction unit having three reduction stages for manufacturing factory use. To find out the correlation between the vibration and the shaft rotation, the vibration of the gear box was averaged synchronously to each shaft revolution. It has become clear that a second shaft part among four is faulty because the concerned vibration was completely synchronous to that shaft while it was asynchronous to other shafts. Even though the shaft has two gears and two rolling element bearings, the paper concluded that the one of two gears must be faulty after discussing the possibility of causes since the bearing has hardly such a synchronous vibration.
一般社団法人日本機械学会の論文
2001-06-05