| 摘要 |
In this vertical bearing device, a pressure difference occurs in the lubricating oil in an oil circulation chamber 55 as a result of the difference in the centrifugal force, the shear force, or the flow speed when an annular section 33 of a thrust collar 21 rotates together with a rotating shaft member 12. The lubricating oil in the oil circulation chamber 55 is thus guided from the inner circumferential side of the annular section 33 toward the outer circumferential side via a circulation hole 71 passing through the annular section 33. The flow of the lubricating oil guided by the circulation hole 71 forms a lubricating oil flow from a lower oil chamber 47 toward an upper oil chamber 46 via the oil circulation chamber 55. As a result, the rotation of the thrust collar 21 causes lubricating oil that is stored in the lower oil chamber 47 to circulate toward the upper oil chamber 46 via the oil circulation chamber 55. |
