| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent negative pressure at a low cost from arising in a central recessed space facing a central recess of a bearing member. <P>SOLUTION: By means of forming the bearing member (bearing sleeve 8) having the central recess E from a sintered metal, it is possible to impregnate internal pores of the sintered metal with a lubricating oil. Consequently, when the lubricating oil in the central recessed space E0 is pulled toward a radial bearing gap and the pressure of the lubricating oil in the central recessed space E0 drops, the lubricating oil impregnated in the internal pores of the bearing sleeve 8 is supplied to the central recessed space E0 from surface holes of the central recess E, and thus negative pressure is prevented from arising. <P>COPYRIGHT: (C)2012,JPO&INPIT |
