| 摘要 |
PURPOSE: To stabilize bearing performance from no load to high load in a dynamic pressure gas journal bearing. CONSTITUTION: A bearing cylinder 2 made of an elastic thin plate is disposed at a rotary shaft 1 through a bearing clearance 6. Four axially extended ribs 3 are protrusively provided on the periphery of the bearing cylinder 2, and the radius of an imaginary circumscribed circle in the free state of the ribs 3 is set slightly larger than the inner diameter of a housing 4. At the time of assembly, the bearing cylinder 2 is thus compressed to generate an initial deformation to the inner surface, and the same lubricating film as a multi-plane bearing is effectively formed by this initial deformation so as to stabilize a bearing characteristic at the time of no load. Bearing performance at the time of high load can be also stabilized by adjusting the rigidity of the ribs 3. Such a bearing is also provided with vibration proof rubber 7a. |
