224 給油停止時の玉軸受の挙動に関する研究

概要

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In gas turbine engines and helicopter transmissions, even if lubricating oil isn't supplied to bearings in a short time during the operation, bearings are required to have not damage. In this paper, we measured a three-dimensional ball motion, lubricatuing condition, cage speed and temperature of a bearing under oil shut-off condition. A new theory which included a force balance between the ball and the cage into Jones' theory was developed. Experimental results were compared with the results of calculation by the theory. From the experimental results, it was found that the ball speed its own axis and the cage speed decreased just before the bearing seizure. These tendencies were because of the increase of frictional force in the contact area between the ball and the race. Therefore, it was clarified that the bearing seizure was caused by the increase of local friction loss in the contact area.
一般社団法人日本機械学会の論文
2003-04-18