| 摘要 |
PURPOSE:To increase the damping action for an impact pressure and lower the temperature on a bearing surface by allowing the front surface and back surface of a bearing piece to communicate and leading the pressure generated on the bearing surface onto the back surface of the bearing, thus floating the bearing piece by a minute gap. CONSTITUTION:The fluid (l) which exists on the periphery of a thrust collar 1 is swallowed-up into a pocket 5 at the center through spiral grooves 7 on the surface of a bearing piece 2, by the revolution of the thrust collar 1, and a pressure is generated. A pressure dam 6 is formed between the back surface of the bearing piece 2 and a concaved part 8 on the surface of a bearing retainer 3. Said bearing piece 2 can be floated-up for the bearing retainer 3, keeping a minute gap 11, by selecting the area of the pressure dam 6 to a proper value. Therefore, the pressurized fluid flows into the pressure dam 6, passing through a communication passage 9 from the pocket 5, and then flows-out through the gap 11, and lowers the temperature on the bearing surface, and the impact is lightened by the throttle action of the gap 11. |
