| 摘要 |
PURPOSE:To prevent the displacement of a rotary shaft, by forming three pressure chambers in an internal peripheral wall of the main unit of a bearing while variable throttle flow paths between a diaphragm and throttle wall parts so as to supply a lubricant to the pressure chambers through these variable throttle flow paths. CONSTITUTION:Forming three pressure chambers 13a-13c at an equal space in an internal peripheral wall of the main unit 12 of a bearing while variable throttle flow paths 22 between a diaphragm 17 displaced in accordance with a change of pressure in the pressure chambers 13a-13c and throttle wall parts 18, a lubricant of high pressure is supplied to the pressure chambers 13a-13c through these variable throttle flow paths 22. In this way, if a pressure in the chambers 13a-13c becomes a high level, the variable throttle flow paths 22 are spread allowing the lubricant of high pressure of flow into these pressure chambers 13a-13c, thus the displacement of a rotary shaft 11 caused by the change of a load can be prevented before its occurrence. |
