| 摘要 |
<p>PURPOSE:To check an increase in pressure on the inside diameter side of a bush at the time of high speed rotation in a bearing where a bush rotatably supporting a rotary shaft is rotatably supported in a bearing housing by forming the bush with a material having moderate permeability. CONSTITUTION:A bearing 16 includes a bearing housing 19 having an inlet 17 and an outlet 18 for lubricating oil and a bush 21 rotatably fitted in a hole 20. In order to feed lubricating oil to the inner and outer peripheral sliding surfaces of the bush 21, oil paths 22-32 are formed on the bearing housing 19 and the bush 21. In this case, the bush 21 is formed of sintering alloy, for examole, JIS SBK I -kind or II-kind, to obtain permeability. Pressure produced on the inside diameter side of the bush 21 by rotation of a rotary shaft 15 is let off to the outside diameter side of the bush 21 by such permeability. Thus, an increase in pressure on the inside diameter side of the bush 21 is checked to lessen laterally vibrating turn of the rotary shaft 15 and the bush 21 caused by such pressure.</p> |
