| 摘要 |
PROBLEM TO BE SOLVED: To minimize stress to a blade shape and its root by centrifugal force and to provide a row of steam turbine blades displaying superior thermodynamic performance while avoiding resonance excitation. SOLUTION: The blade for a steam turbine includes a root section 2 and an airfoil section 10 contiguous with the root section 2. The airfoil section 10 is shaped to optimize aerodynamic performance while providing optimized flow distribution and minimal centrifugal and bending stresses. The blade also includes a blade end section 4 continuous with the airfoil section 10, and a cover 5 formed as part of the blade end section 4. The cover 5 defines a radial seal that serves to minimize blade end losses. The moving blade is capable of running at operating speeds between 5,625-11,250 rpm. COPYRIGHT: (C)2009,JPO&INPIT
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