| 摘要 |
<p>A bucket to wheel dovetail attachment includes axially spaced radially extending wheel fingers having discrete sections (22, 24, 26) of decreased axial thickness in a radial outward direction with transition fillets (28, 30) between sections of different thicknesses. The wheel fingers define wheel finger slots (20) for receiving correspondingly shaped bucket dovetail fingers (44). Pins (49) interconnect the buckets (12) and rotor wheel (10). The slot bottoms likewise have fillets (34). The fillets on the wheel fingers and slot bottoms have a blend of different radii with the larger radii outward of the smaller radii to reduce stress concentrations and to avoid stress corrosion cracking in steam turbine applications.</p> |
