| 摘要 |
PURPOSE:To enable perfect restoration to the original status after finished test, by admitting water into a clearance between blade root and blade groove and fixing the root in the groove by freeze-solidification of water. CONSTITUTION:On both sides of a disc 3 on anti-water-leakage plate 5 is mounted, a hose 6 for freezer is supported by an arm 5a, water is introduced into a clearance between blade root 2 and blade groove 4, freezer is made to flow through the hose 6, allowing it to be injected from a small hole 6a for cooling a part of the vaneroot 2 and for causing freeze-solidification of water and thus, the blade root 2 is fixed in the blade groove 4 utilizing cubical expansion of ice and freezing action of water. As the freezer, liquefied nitrogen, etc. is used. Uniform blade root fixing condition becomes available and measurements can be obtained with less fluctuation. Upon finishing the measurement, water can easily be discharged and disc and blade root can be restored to the original condition in a perfect manner. |
