Optimized blade root profile for steam turbine blades

Details Optimized blade root profile for steam turbine blades Optimized blade root profile for steam turbine blades

1991-03-21

1992-09-15

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

416223A, F01D 530

Patent

active

051471809

ABSTRACT:
A turbine blade includes an airfoil portion, a platform portion from which the airfoil portion extends upwardly, and a root portion extending downwardly from the platform portion, the root portion includes in descending order an upper-most root neck, an intermediate root neck, and a lower-most root neck, an upper-most lug being formed beneath the upper-most root neck, an intermediate lug being formed beneath the intermediate neck, and a lower-most lug being formed beneath the lower-most root neck. The upper-most neck includes a first top radius R1 and a second lower radius R2, wherein a length of R1 is about 30% greater than a length of R2.

REFERENCES:
patent: 3079681 (1963-03-01), Fentiman
patent: 4191509 (1980-03-01), Leonardi
patent: 4260331 (1981-04-01), Goodwin
patent: 4692976 (1987-09-01), Andrews
patent: 4824328 (1989-04-01), Pisz et al.

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