| 摘要 |
PURPOSE:To enable a clearance in the end of a moving blade to be adjusted, by providing a soft metallic material in the internal surface, oppositely faced to the end of the moving blade, of a casing through a shape-memory alloy of coil spring shape. CONSTITUTION:A casing 1 provides in its recessed groove 1a, opposed to the end of a moving blade 3, a soft metallic material 2 through a shape-memory alloy 5 of coil spring shape. A clearance in the end of the moving blade 3 can be adjusted in accordance with an operating condition because the shape-memory alloy 5 is extended and contracted by the temperature of fluid. |
