| 摘要 |
PURPOSE:To prevent reduction of the intrinsic vibration frequency of a movable blade made of Ti-alloy by increasing the thickness of the movable blade which is made of Ti-alloy and used for low-pessure step by 5% than that of the blade which is made of 12Cr-steel and possesses an ordinary profile. CONSTITUTION:The section shown by the dotted line denotes the section of a movable blade 2 made of Ti-alloy, and the belly-side shape 4 is formed thicker by A corresponding to nearly 5% of the average thickness of the vane, in comparison with the section of the movable blade 1 which is shown by the solid line and made of 12Cr-steel. |
