| 摘要 |
PURPOSE:To permit a large thrust load to be supported, by forming a groove in either a sliding plate or a bearing plate and generating the dynamic pressure of fluid between two flat surfaces of ceramics which come into slide contact with cach other. CONSTITUTION:A sliding plate 4 forms on its slide contact surface a spiral groove 11 for generating a dynamic pressure. And the action of the dynamic pressure generating spiral groove 11, which forms a thin film of fluid in a sliding part, causes the sliding plate 4 to substantially make a relatively rotating motion with a bearing plate 9 preventing both the plates from coming into solid contact with each other. Since a dynamic pressure is generated in the sliding part as a whole, the bending moment in accordance with the dynamic pressure acts on the sliding plate 4 and the bearing plate 9. A back surface of the bearing plate 9 is supported by an elastic member 8 almost over the whole surface. Accordingly, a large thrust load can be supported by small decreasing a deformation amount of the bearing plate 9 due to the dynamic pressure preventing the thrust load from locally concentrating. |
