Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Blade received by continuous circumferential channel
Patent
1994-10-06
1996-06-04
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Specific working member mount
Blade received by continuous circumferential channel
416219R, 416244A, F01D 502
Patent
active
055227066
ABSTRACT:
Turbomachinery rotor component, which may be a disk or drum rotor, having an annular rim disposed about a centerline for securing the blades to the rotor and that is subject to a tensile stress field due to centrifugal and thermal growth induced forces generated by the rotor when the rotor is rotating. An annular channel slot is cut around the rim, has outer annular overhanging rails, and has at least one stress riser in the form of a three sided slot cut in the radial direction through one of the rails. A region around rounded corners of the stress riser has deep compressive residual stresses imparted by laser shock peening and extends inward from a laser shocked surface of the component encompassed by the region. A more particular embodiment, the annular channel slot is a dovetail blade root slot and the outer annular overhanging rails each has pairs of stress risers in the form of opposing three sided slots cut in the radial direction through each of the rails wherein one pair is a pair of blade loading slots and another pair is a pair of blade locking slots.
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Cowie William D.
Mannava Seetharamaiah
General Electric Company
Herkamp Nathan D.
Hess Andrew C.
Larson James A.
Look Edward K.
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