Two-lug side-entry turbine blade attachment

Details Two-lug side-entry turbine blade attachment Two-lug side-entry turbine blade attachment

1992-03-24

1993-01-05

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

B21K 304

Patent

active

051765004

ABSTRACT:
A blade root including, in downward order and symmetrical on each side of a center line: an upper neck of width w.sub.2 ; an upper lug having an upper flat bearing surface and a fillet surface of radius R.sub.2, the upper root bearing surface contacting an upper flat groove bearing surface, the groove including a fillet surface of radius R.sub.3, the upper root bearing surface and the upper groove bearing surface contacting over a length l.sub.1 from the beginning point of the upper groove bearing surface to the terminating point of the upper root bearing surface; a lower neck of width w.sub.2 ; and a lower lug having a lower flat root bearing surface and a fillet surface of radius R.sub.6, the lower root bearing surface contacting a lower flat groove bearing surface, the groove including a fillet surface of radius r.sub.7, the lower root bearing surface and the lower groove bearing surface contacting over a length l.sub.2, with the following ratios, w.sub.2 to w.sub.1 about 0.69, R.sub.2 to w.sub.1 about 0.15, R.sub.3 to w.sub.1 about 0.15, R.sub.6 to w.sub.1 about 0.08, R.sub.7 to w.sub.1 about 0.12, l.sub.1 to w.sub.1 about 0.13, and l.sub.2 to w.sub.1 about 0.10.

REFERENCES:
patent: 4191509 (1980-03-01), Leonardi
patent: 4260331 (1981-04-01), Goodwin
patent: 5110262 (1992-05-01), Evans

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