| 摘要 |
A high precision radial foil bearing is provided to maintain the original shape even when an initial assembling pre-load is applied to the radial foil bearing, thereby reducing driving torque. A high precision radial foil bearing includes a bearing housing(1), a bump(2), a top foil(3), and a key(4). If a pre-load is applied to the top foil, the top foil is pressed inward to make friction with a shaft(6). By making the thickness of the top foil large sufficiently, the top foil maintains the original shape. A gap between a shaft and the top foil can be always maintained at the minimum so that the friction can be minimized even in a stop state. The top foil can maintain the original shape by interposing a spacer between the key and a cut surface(5). |
