ラジアル荷重下における転がり軸受振動の定式化と低速回転域での劣化診断への適用

摘要

In order to apply failure diagnosis of a rotating machine, normal and abnormal vibrations of a rolling-element bearing were formulated by using Hertzian contact theory. In this paper, two dimensional dynamics of a rolling-element bearing were formulated and bearing defects were classified to the three types of impulse train. By using these formulations, some numerical examples were conducted to clarify characteristics of bearing vibrations. In the result, it was found that vibration of vertical force at an outer ring has one eigen frequency and the eigen frequency does not change largely by rotating speed and presence of a defect. Using these characteristics, the new method of failure detection was applied to the rotating machine at low speed.%回転機械の保守方法として，弓削ヒを定量的に把握することで設備の寿命を見極め保全計画へと反映させる 状態監視保全の考え方は設備管理の高度化に伴い年々重要となっている．