| 摘要 |
<p>A highly corrosion-resistant movable blade assembly (20) for a steam turbine, in particular a geothermal impulse turbine, has an array (14) of rotor blades (15) carried by a shaft (7) rotating about an axis (A)/each blade (15) extends between one end (22) attached to the shaft (7), and a free end (24) terminating with a top portion (25) with no mechanical connection to the top portions (25) of the other blades (15); the blades (15) are made of a nickel-based metal alloy containing chromium, iron, niobium, and molybdenum, e.g. a metal alloy in the INCONEL(R) group or a similar material. For high resistance against corrosion and erosion. In particular, the blades are unshrouded to avoid accumulation of deposits and subdeposit corrosion.</p> |
