| 摘要 |
PURPOSE:To maintain pressurization even for a change of temperature, by coaxially mounting a sleeve of equal material to a cylinder in the periphery of a rotary shaft. CONSTITUTION:Bearings 13, 14 are provided in both sides of a cylinder 12 to support a rotary shaft 21. A sleeve 22 is coaxially mounted in the periphery of the rotary shaft 21 between the bearings 13, 14. This sleeve 22 is of equal material to the cylinder 12. The sleeve 22 is fixed to the rotary shaft 21 by a fixing means 23, for instance, at a side of the bearing 13. In this constitution, even if the cylinder 12 is elongated due to a change of its temperature, the sleeve 22 of equal material is similarly elongated, thus pressurization can be maintained as left in that state. |
