Turbine wheel with shear configured stress discontinuity

Details Turbine wheel with shear configured stress discontinuity Turbine wheel with shear configured stress discontinuity

1976-09-16

1977-12-13

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Support mounting, carrier or fairing structure

416213R, F01D 502

Patent

active

040626385

ABSTRACT:
An integrally cast turbine blade and wheel assembly has a plurality of circumferentially spaced radially outwardly directed blades on a peripheral rim that is connected by a wheel web to a central hub having a bore therethrough. The assembly includes a plurality of circumferentially spaced, pairs of grooves to define a plurality of weakened sections in the wheel rim and web that will selectively crack in shear to relieve stresses during either a tensile or compressive phase of wheel assembly operation produced during thermal cycling of an associated engine; and wherein resultant stress relief cracks define a labyrinth seal path to control gas bypass across the blade row.

REFERENCES:
patent: 3255994 (1966-06-01), Dreimanis
patent: 3262674 (1966-07-01), Huebner et al.
patent: 3262675 (1966-07-01), Huebner et al.
patent: 3262676 (1966-07-01), Huebner

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